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Google Keyword Rankings for : receive directivity factor
1
Receiving Directivity
http://on5au.be/content/amod/amod144.htm
This Ham's Receiving Directivity Factor (RDF) compares forward gain at a desired direction and elevation angle to average gain over the entire hemisphere.
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http://on5au.be/content/amod/amod144.htm
This Ham's Receiving Directivity Factor (RDF) compares forward gain at a desired direction and elevation angle to average gain over the entire hemisphere.
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2
Directivity Factor - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/engineering/directivity-factor
The directivity factor is the ratio of the intensity [6] on a designated axis of a sound radiator at a stated distance r to the intensity that would be produced ...
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https://www.sciencedirect.com/topics/engineering/directivity-factor
The directivity factor is the ratio of the intensity [6] on a designated axis of a sound radiator at a stated distance r to the intensity that would be produced ...
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3
'Directivity Factor' and 'Directivity Index' - what are they?
https://www.audiomasterclass.com/blog/directivity-factor-and-directivity-index-what-are-they
The directional characteristics of a sound source are highly influenced by nearby reflecting surfaces. Take the example of an omnidirectional ...
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https://www.audiomasterclass.com/blog/directivity-factor-and-directivity-index-what-are-they
The directional characteristics of a sound source are highly influenced by nearby reflecting surfaces. Take the example of an omnidirectional ...
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4
2020 Extra Class study guide: E9H – Receiving Antennas
https://www.kb6nu.com/2020-extra-class-study-guide-e9h-receiving-antennas-radio-direction-finding-antennas-beverage-antennas-specialized-receiving-antennas-long-wire-receiving-antennas/
The ratio of forward gain to the average gain over the hemisphere in which a directional antenna is pointing is a good measure of how well a ...
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https://www.kb6nu.com/2020-extra-class-study-guide-e9h-receiving-antennas-radio-direction-finding-antennas-beverage-antennas-specialized-receiving-antennas-long-wire-receiving-antennas/
The ratio of forward gain to the average gain over the hemisphere in which a directional antenna is pointing is a good measure of how well a ...
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5
Receiving Antenna Design - W8JI
https://www.w8ji.com/receiving_basics.htm
Using the above method, we can estimate antenna performance for evenly distributed noise. If there is no change in the Receiving Directivity Factor for similar ...
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https://www.w8ji.com/receiving_basics.htm
Using the above method, we can estimate antenna performance for evenly distributed noise. If there is no change in the Receiving Directivity Factor for similar ...
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6
Directivity Factor - Encyclopedia - The Free Dictionary
https://encyclopedia2.thefreedictionary.com/Directivity+Factor
The ratio of radiated sound intensity at a remote point on the principal axis of a loudspeaker or other transducer, to the average intensity of the sound ...
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https://encyclopedia2.thefreedictionary.com/Directivity+Factor
The ratio of radiated sound intensity at a remote point on the principal axis of a loudspeaker or other transducer, to the average intensity of the sound ...
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7
Receiving Antenna Metrics With Examples - wwrof
http://wwrof.org/wp-content/uploads/2018/02/Receiving-Antenna-Metrics-With-Examples-v20p.pdf
Receiving Directivity Factor. ○ Directivity Merit Figure. ○ Noise Margin. ○ Leaking Index. ○ Receiving antennas for residential ...
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http://wwrof.org/wp-content/uploads/2018/02/Receiving-Antenna-Metrics-With-Examples-v20p.pdf
Receiving Directivity Factor. ○ Directivity Merit Figure. ○ Noise Margin. ○ Leaking Index. ○ Receiving antennas for residential ...
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8
Sound - Attenuation and the Directivity Coefficient
https://www.engineeringtoolbox.com/directivity-coefficient-sound-d_67.html
The attenuation in a room depends on the location of the sound source and the receiver - and the room constant. ; L · = received sound pressure level (dB) ; L · = ...
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https://www.engineeringtoolbox.com/directivity-coefficient-sound-d_67.html
The attenuation in a room depends on the location of the sound source and the receiver - and the room constant. ; L · = received sound pressure level (dB) ; L · = ...
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9
Tutorial: Antenna Gain and Directivity - Electronics For You
https://www.electronicsforu.com/resources/antenna-gain-directivity
k or η: antenna efficiency factor (0 ≤ k ≤ 1), dimensionless. If k or η = 1, i.e. for a lossless antenna, .In practice, gain is always less ...
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https://www.electronicsforu.com/resources/antenna-gain-directivity
k or η: antenna efficiency factor (0 ≤ k ≤ 1), dimensionless. If k or η = 1, i.e. for a lossless antenna, .In practice, gain is always less ...
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10
On the Calculation of Full and Partial Directivity Indices
https://www.princeton.edu/3D3A/Publications/Tylka_3D3A_DICalculation.pdf
directivity factor (or directivity index when expressed in dB) is defined as the acoustic intensity at a given point on the surface of an imaginary sphere ...
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https://www.princeton.edu/3D3A/Publications/Tylka_3D3A_DICalculation.pdf
directivity factor (or directivity index when expressed in dB) is defined as the acoustic intensity at a given point on the surface of an imaginary sphere ...
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11
Relative directivity factor - Wikiwand
https://www.wikiwand.com/en/Relative_directivity_factor
Relative directivity factor is a figure of merit for radio receiving antennas.[1] It is the antenna gain in the forward direction divided by the gain in all ...
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https://www.wikiwand.com/en/Relative_directivity_factor
Relative directivity factor is a figure of merit for radio receiving antennas.[1] It is the antenna gain in the forward direction divided by the gain in all ...
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12
Amateur Extra pool, section E9H - HamStudy.org
https://hamstudy.org/browse/E4_2020/E9H
Amateur Extra question pool, Subelement E9, Section E9H: Receiving Antennas: radio direction finding ... What is Receiving Directivity Factor (RDF)?.
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https://hamstudy.org/browse/E4_2020/E9H
Amateur Extra question pool, Subelement E9, Section E9H: Receiving Antennas: radio direction finding ... What is Receiving Directivity Factor (RDF)?.
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13
RDFMetric - Seed Solutions
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/RDFMetric.htm
On this page, I would like to compare a number of low-band receiving antennas, and rank them according to the RDF (receiving directivity factor) ...
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http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/RDFMetric.htm
On this page, I would like to compare a number of low-band receiving antennas, and rank them according to the RDF (receiving directivity factor) ...
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14
Understanding Antenna Gain, Beamwidth, And Directivity
https://www.ahsystems.com/articles/Understanding-antenna-gain-beamwidth-directivity.php
In a transmitting antenna, gain describes the antenna's ability to convert input power to radio waves sent in a specified direction. In a receiving antenna, ...
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https://www.ahsystems.com/articles/Understanding-antenna-gain-beamwidth-directivity.php
In a transmitting antenna, gain describes the antenna's ability to convert input power to radio waves sent in a specified direction. In a receiving antenna, ...
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15
Directivity factors for linear arrays of velocity sensors
https://asa.scitation.org/doi/10.1121/1.1373706
Not surprisingly, this directivity gain is highly dependent on signal arrival direction. Indeed, a uniaxial velocity sensor's directivity can be less than that ...
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https://asa.scitation.org/doi/10.1121/1.1373706
Not surprisingly, this directivity gain is highly dependent on signal arrival direction. Indeed, a uniaxial velocity sensor's directivity can be less than that ...
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16
Transmitting and Receiving Antennas - Rutgers ECE
https://www.ece.rutgers.edu/~orfanidi/ewa/ch16.pdf
The directivity is often expressed in dB,† that is, DdB = 10 log10 Dmax. ... For a lossless antenna the efficiency factor will be unity and.
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https://www.ece.rutgers.edu/~orfanidi/ewa/ch16.pdf
The directivity is often expressed in dB,† that is, DdB = 10 log10 Dmax. ... For a lossless antenna the efficiency factor will be unity and.
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17
Comparison Chart of Rx antennas.
https://www.k7tjr.com/rx1comparison.htm
The average response is then subtracted from the peak response and the result is expressed as Relative Directivity Factor or RDF. This result is also a ratio as ...
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https://www.k7tjr.com/rx1comparison.htm
The average response is then subtracted from the peak response and the result is expressed as Relative Directivity Factor or RDF. This result is also a ratio as ...
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18
Directivity Factors of the First-Order Steerable Differential ...
https://ieeexplore.ieee.org/document/7348655/
First, it is shown that for a given array geometry there exists a finite permissible range of the Q-factor and this range reduces to zero for large spacings.
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https://ieeexplore.ieee.org/document/7348655/
First, it is shown that for a given array geometry there exists a finite permissible range of the Q-factor and this range reduces to zero for large spacings.
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19
Directivity Patterns in Acoustic Testing - Demonstration
https://www.youtube.com/watch?v=03lOj8mxaYU
PCB Piezotronics
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https://www.youtube.com/watch?v=03lOj8mxaYU
PCB Piezotronics
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20
Antenna Directivity Factor - YouTube
https://www.youtube.com/watch?v=XCdg4GA1rrk
ChipDipvideo
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https://www.youtube.com/watch?v=XCdg4GA1rrk
ChipDipvideo
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21
Some Notes on Low-Noise Receive Antennas - K9LA
https://k9la.us/May16_Notes_on_Low-Noise_Receive_Antennas.pdf
The RDF (Receiving Directivity Factor) of an antenna is a measure of the theoretical improvement in signal-to-noise ratio of an antenna.
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https://k9la.us/May16_Notes_on_Low-Noise_Receive_Antennas.pdf
The RDF (Receiving Directivity Factor) of an antenna is a measure of the theoretical improvement in signal-to-noise ratio of an antenna.
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22
Directivity Index and Directivity Factor - EAW
https://design.eaw.com/knowledge/directivity-index-and-directivity-factor
The gain produced by concentrating the sound energy is called the directivity index - DI. It is expressed in relative dB. A spherical source has a DI = 0 dB ...
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https://design.eaw.com/knowledge/directivity-index-and-directivity-factor
The gain produced by concentrating the sound energy is called the directivity index - DI. It is expressed in relative dB. A spherical source has a DI = 0 dB ...
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23
F.162-3 - Use of directional transmitting antennas in the ... - ITU
https://www.itu.int/dms_pubrec/itu-r/rec/f/R-REC-F.162-3-199203-I!!MSW-E.doc
2. that the minimum standard antenna should have a directivity factor given by: ... There is no requirement for the transmitting and receiving antennas to ...
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https://www.itu.int/dms_pubrec/itu-r/rec/f/R-REC-F.162-3-199203-I!!MSW-E.doc
2. that the minimum standard antenna should have a directivity factor given by: ... There is no requirement for the transmitting and receiving antennas to ...
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24
Yagi Antenna Gain, Directivity, Front to Back Ratio
https://www.electronics-notes.com/articles/antennas-propagation/yagi-uda-antenna-aerial/gain-directivity.php
Coupled to this the fact that it has reduced gain in other directions means that it receives or transmits less signal in other directions thereby reducing the ...
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https://www.electronics-notes.com/articles/antennas-propagation/yagi-uda-antenna-aerial/gain-directivity.php
Coupled to this the fact that it has reduced gain in other directions means that it receives or transmits less signal in other directions thereby reducing the ...
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25
Sonar Equation - MATLAB & Simulink
https://www.mathworks.com/help/phased/ug/sonar-equation.html
The sonar equation includes the directivity index of the receiver (DI). Directivity is the ratio of the total noise power at the array to the noise received ...
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https://www.mathworks.com/help/phased/ug/sonar-equation.html
The sonar equation includes the directivity index of the receiver (DI). Directivity is the ratio of the total noise power at the array to the noise received ...
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26
Far Fields and Receiving Antennas - Documentation
https://2021.help.altair.com/2021/feko/topics/feko/user_guide/output_file/farfields_receving_ant_feko_r.htm
Far fields and receiving antennas data consist of the electric far field data, RCS, gain, directivity and radiated power.
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https://2021.help.altair.com/2021/feko/topics/feko/user_guide/output_file/farfields_receving_ant_feko_r.htm
Far fields and receiving antennas data consist of the electric far field data, RCS, gain, directivity and radiated power.
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27
performance-prediction.pdf - SyQwest
https://www.syqwestinc.com/media/support/performance-prediction.pdf
= Directivity index of receiving transducer. It should be remembered that self noise, like ambient noise, is not always isotropic in its directional ...
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https://www.syqwestinc.com/media/support/performance-prediction.pdf
= Directivity index of receiving transducer. It should be remembered that self noise, like ambient noise, is not always isotropic in its directional ...
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28
Sound power level SWL and sound pressure level SPL ...
http://www.sengpielaudio.com/calculator-soundpower.htm
... intensity level strength directivity factor coefficient sound intensity SIL sound ... For the practically occurring solid angle, we get the following ...
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http://www.sengpielaudio.com/calculator-soundpower.htm
... intensity level strength directivity factor coefficient sound intensity SIL sound ... For the practically occurring solid angle, we get the following ...
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29
New Product Spotlight: Hi-Z Antennas Four Element V2 4 ...
https://www.onallbands.com/new-product-spotlight-hi-z-antennas-four-element-v2-4-square-receive-array-systems-%EF%BB%BF/
Version 2 PC-4A Phase Controller, which combines the received signals ... signal-to-noise performance with Receive Directivity Factor (RDF) ...
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https://www.onallbands.com/new-product-spotlight-hi-z-antennas-four-element-v2-4-square-receive-array-systems-%EF%BB%BF/
Version 2 PC-4A Phase Controller, which combines the received signals ... signal-to-noise performance with Receive Directivity Factor (RDF) ...
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30
Approximations to Directivity for Linear, Planar, and ...
https://www.convexoptimization.com/TOOLS/arrayaperture.pdf
Directivity Factors for Uniform Linear Arrays 7 ... where S is defined as the received signal power level and iV; is defined as the ...
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https://www.convexoptimization.com/TOOLS/arrayaperture.pdf
Directivity Factors for Uniform Linear Arrays 7 ... where S is defined as the received signal power level and iV; is defined as the ...
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31
MVDR beamformer directivity factor. - ResearchGate
https://www.researchgate.net/figure/MVDR-beamformer-directivity-factor_fig2_251200598
Download scientific diagram | MVDR beamformer directivity factor. from publication: OPTIMUM POSTFILTER ESTIMATION FOR NOISE REDUCTION IN MULTICHANNEL SPEECH ...
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https://www.researchgate.net/figure/MVDR-beamformer-directivity-factor_fig2_251200598
Download scientific diagram | MVDR beamformer directivity factor. from publication: OPTIMUM POSTFILTER ESTIMATION FOR NOISE REDUCTION IN MULTICHANNEL SPEECH ...
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32
De-Embedding of Directivity Index of a Hydroacoustical ...
https://www.sto.nato.int/publications/STO%20Meeting%20Proceedings/RTO-MP-SET-095/MP-SET-095-15.pdf
hydroacoustical input of sonar antenna in the receive. Therefore, value of directivity index in the receive DIR is one of the important parameter in the bi- ...
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https://www.sto.nato.int/publications/STO%20Meeting%20Proceedings/RTO-MP-SET-095/MP-SET-095-15.pdf
hydroacoustical input of sonar antenna in the receive. Therefore, value of directivity index in the receive DIR is one of the important parameter in the bi- ...
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33
Easy to Build Low Band Receiving Antennas for Small and ...
https://www.contestuniversity.com/wp-content/uploads/2020/05/W3LPL-Effective-Low-Band-Receiving-Antennas.pdf
Receiving Directivity Factor (RDF) proven measure of receiving antenna performance. ○ Compares forward gain at the desired azimuth and elevation.
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https://www.contestuniversity.com/wp-content/uploads/2020/05/W3LPL-Effective-Low-Band-Receiving-Antennas.pdf
Receiving Directivity Factor (RDF) proven measure of receiving antenna performance. ○ Compares forward gain at the desired azimuth and elevation.
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34
Directivity - Strutt
https://strutt.arup.com/help/Directivity/LouvreDirectSRLDirectivity.pdf
In this case the directivity factor Q = 2 and an allowance ... calculation unless the receiving position is at a great distance (11.3.4 and 11.3.5).
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https://strutt.arup.com/help/Directivity/LouvreDirectSRLDirectivity.pdf
In this case the directivity factor Q = 2 and an allowance ... calculation unless the receiving position is at a great distance (11.3.4 and 11.3.5).
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35
NIST System for Measuring the Directivity Index of Hearing ...
https://nvlpubs.nist.gov/nistpubs/jres/118/jres.118.005.pdf
when it is in a free field, directivity index measurements of hearing aids ... the directionality of an electroacoustic device that receives.
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https://nvlpubs.nist.gov/nistpubs/jres/118/jres.118.005.pdf
when it is in a free field, directivity index measurements of hearing aids ... the directionality of an electroacoustic device that receives.
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36
Dedicated Acoustics Plots for Postprocessing
https://doc.comsol.com/5.5/doc/com.comsol.help.aco/aco_ug_pressure.05.109.html
In the 3D radiation pattern plots, the directivity can also be calculated by ... and the directivity given in dB (also known as the directivity index).
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https://doc.comsol.com/5.5/doc/com.comsol.help.aco/aco_ug_pressure.05.109.html
In the 3D radiation pattern plots, the directivity can also be calculated by ... and the directivity given in dB (also known as the directivity index).
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37
The directivity index, or DI, is a special case of array gain for ...
https://apps.dtic.mil/sti/citations/ADA143103
The directivity index, or DI, is a special case of array gain for the condition when the signal is a plane wave and the noise field is isotropic.
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https://apps.dtic.mil/sti/citations/ADA143103
The directivity index, or DI, is a special case of array gain for the condition when the signal is a plane wave and the noise field is isotropic.
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38
Receive Antennas: Beverages and Beyond
https://w8wky.org/wp-content/uploads/2019/08/Receive-Antennas-Final.pdf
Receive antenna performance is measured using (RDF) Receiving Directivity. Factor. • Compares forward gain at the desired azimuth and elevation angle to average ...
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https://w8wky.org/wp-content/uploads/2019/08/Receive-Antennas-Final.pdf
Receive antenna performance is measured using (RDF) Receiving Directivity. Factor. • Compares forward gain at the desired azimuth and elevation angle to average ...
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39
Ideal vs Real Loudspeaker Directivity - Prosoundtraining
https://www.prosoundtraining.com/2010/03/17/ideal-vs-real-directivity/
The directivity factor Q provides a simple but effective way to describe the sound radiation from a source. Manipulation of Q is a major tool ...
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https://www.prosoundtraining.com/2010/03/17/ideal-vs-real-directivity/
The directivity factor Q provides a simple but effective way to describe the sound radiation from a source. Manipulation of Q is a major tool ...
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40
A Brief Overview of Sonar Operation by Donald P. Massa
https://www.massa.com/wp-content/uploads/2017/08/DPM_Overview_of_Sonar_Operation.pdf
The transducer receives the electrical energy and transforms it into acoustic energy ... Directivity Index (DI) of the sonar system.
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https://www.massa.com/wp-content/uploads/2017/08/DPM_Overview_of_Sonar_Operation.pdf
The transducer receives the electrical energy and transforms it into acoustic energy ... Directivity Index (DI) of the sonar system.
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41
A Two-element Parasitic Antenna Approaching the Minimum ...
https://arxiv.org/abs/1705.02281
A maximum directivity of 7.2 dBi is measured with a radiation efficiency of -6.5 dB at 876 MHz. An intermediate directivity of 6.2 dBi is ...
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https://arxiv.org/abs/1705.02281
A maximum directivity of 7.2 dBi is measured with a radiation efficiency of -6.5 dB at 876 MHz. An intermediate directivity of 6.2 dBi is ...
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42
Calculate Directivity index of nonlinear line array
https://www.dsprelated.com/thread/942/calculate-directivity-index-of-nonlinear-line-array
3) The receive DI is the comparison of noise received by the array output (beamformer output really) to that received by an omnidirectional ...
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https://www.dsprelated.com/thread/942/calculate-directivity-index-of-nonlinear-line-array
3) The receive DI is the comparison of noise received by the array output (beamformer output really) to that received by an omnidirectional ...
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43
loudspeaker q, directivity - AV-info
https://av-info.eu/audio/directivity.html
Directivity Factor Q is the SPL ratio squared at the measured point (measured axis) to the mean squared SPL at the same distance over all directions together.
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https://av-info.eu/audio/directivity.html
Directivity Factor Q is the SPL ratio squared at the measured point (measured axis) to the mean squared SPL at the same distance over all directions together.
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44
Receive Eight Circle Array Complete System Package
https://static.dxengineering.com/global/images/instructions/dxe-rca8b-sys-4p_rev2a.pdf
receive antenna systems and Receive Directivity Factor are described in. “ON4UN's Low Band DXing” by John Devoldere, available from DX. Engineering.
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https://static.dxengineering.com/global/images/instructions/dxe-rca8b-sys-4p_rev2a.pdf
receive antenna systems and Receive Directivity Factor are described in. “ON4UN's Low Band DXing” by John Devoldere, available from DX. Engineering.
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45
Directivity and antenna gain - Radartutorial
https://www.radartutorial.eu/06.antennas/an07.en.html
The directivity is an essential component of antenna gain. In the case of a real antenna gain, gains and losses must be considered. The radiated power of an ...
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https://www.radartutorial.eu/06.antennas/an07.en.html
The directivity is an essential component of antenna gain. In the case of a real antenna gain, gains and losses must be considered. The radiated power of an ...
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46
Relationship Between Directivity Factor and Directivity Index
https://link.springer.com/chapter/10.1007/978-1-4615-2027-6_30
Figure 30 plots the directivity factor (Q) against the directivity index (DI). As discussed in section 23, Q and DI are useful ways of presenting the same ...
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https://link.springer.com/chapter/10.1007/978-1-4615-2027-6_30
Figure 30 plots the directivity factor (Q) against the directivity index (DI). As discussed in section 23, Q and DI are useful ways of presenting the same ...
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47
Antenna Basics: Radiation Patterns, Permittivity, Directivity ...
https://www.allaboutcircuits.com/technical-articles/antenna-basics-field-radiation-patterns-permittivity-directivity-gain/
Low-directivity antennas transmit and receive information from all directions more or less equally. These are useful in mobile applications where the direction ...
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https://www.allaboutcircuits.com/technical-articles/antenna-basics-field-radiation-patterns-permittivity-directivity-gain/
Low-directivity antennas transmit and receive information from all directions more or less equally. These are useful in mobile applications where the direction ...
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48
Measurement of Loudspeaker Directivity - Klippel GmbH
https://www.klippel.de/training/attachments/training8/Training_8_Measurement_of_Loudspeaker_Directivity_en.pdf
Receive an email containing a Certificate with high distinction, distinction or credit ... front side which increases the directivity index.
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https://www.klippel.de/training/attachments/training8/Training_8_Measurement_of_Loudspeaker_Directivity_en.pdf
Receive an email containing a Certificate with high distinction, distinction or credit ... front side which increases the directivity index.
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49
Analysis of HF Receiving Antenna SNR and Application
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021RS007343?mi=526q93&af=R&content=articlesChapters&countTerms=true&field1=AllField&sortBy=Earliest&target=default&text1=lightning+OR+TGF+OR+sprite+OR+thunderstorm
A comprehensive analysis on the noise factor and the coefficients of high frequency (HF) receiving antennas' impact on signal-to-noise ratio ...
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https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021RS007343?mi=526q93&af=R&content=articlesChapters&countTerms=true&field1=AllField&sortBy=Earliest&target=default&text1=lightning+OR+TGF+OR+sprite+OR+thunderstorm
A comprehensive analysis on the noise factor and the coefficients of high frequency (HF) receiving antennas' impact on signal-to-noise ratio ...
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50
Evaluation of the influence of directivity factor of ... - IOPscience
https://iopscience.iop.org/article/10.1088/1742-6596/1279/1/012024/pdf
Mean square deviations of errors of azimuth and angle of elevation coordinates were estimated, to take into account the shape of the antenna pattern of patch ...
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https://iopscience.iop.org/article/10.1088/1742-6596/1279/1/012024/pdf
Mean square deviations of errors of azimuth and angle of elevation coordinates were estimated, to take into account the shape of the antenna pattern of patch ...
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51
Interpreting the Directivity Index (DI) - The Hearing Review
https://hearingreview.com/practice-building/practice-management/interpreting-the-directivity-index-di
› Practice Management
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https://hearingreview.com/practice-building/practice-management/interpreting-the-directivity-index-di
› Practice Management
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52
Directivity index measurement - steps to follow
https://sound.stackexchange.com/questions/42642/directivity-index-measurement-steps-to-follow
This should give you the measurements to use the math on. If I got it from the quick search I did, you need to work out the directivity factor ( ...
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https://sound.stackexchange.com/questions/42642/directivity-index-measurement-steps-to-follow
This should give you the measurements to use the math on. If I got it from the quick search I did, you need to work out the directivity factor ( ...
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53
What is Antenna Directivity? - everything RF
https://www.everythingrf.com/community/what-is-antenna-directivity
Directivity is the measure of the concentration of an antennas's radiation pattern in a particular direction. Directivity is expressed in dB ...
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https://www.everythingrf.com/community/what-is-antenna-directivity
Directivity is the measure of the concentration of an antennas's radiation pattern in a particular direction. Directivity is expressed in dB ...
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54
Antenna Gain
https://www.antenna-theory.com/basics/gain.php
A transmitting antenna with a gain of 3 dB means that the power received far from the antenna will be 3 dB higher (twice as much) than what would be received ...
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https://www.antenna-theory.com/basics/gain.php
A transmitting antenna with a gain of 3 dB means that the power received far from the antenna will be 3 dB higher (twice as much) than what would be received ...
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55
The VE3DO Loop A Compact, Easy to Build Receiving ...
http://audiosystemsgroup.com/VE3DO.pdf
Receiving Antenna for 160M and 80M. Jim Brown, K9YC ... Directivity should favor desired signal and reject the noise ... Receive Directivity Factor (RDF).
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http://audiosystemsgroup.com/VE3DO.pdf
Receiving Antenna for 160M and 80M. Jim Brown, K9YC ... Directivity should favor desired signal and reject the noise ... Receive Directivity Factor (RDF).
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56
Low Band Receive Antenna - WB5NHL Ham Radio
https://oldcyberdude.com/sample-page/antennas/low-band-receive-antenna/
With receive antennas, antenna gain is not used as the figure of merit. Rather, Relative Directivity Factor (RDF) is used. RDF is the difference between the ...
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https://oldcyberdude.com/sample-page/antennas/low-band-receive-antenna/
With receive antennas, antenna gain is not used as the figure of merit. Rather, Relative Directivity Factor (RDF) is used. RDF is the difference between the ...
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57
What Is Directivity Factor In Acoustics? - QuestionAnswer.io
https://questionanswer.io/what-is-directivity-factor-in-acoustics/
The directivity factor is the ratio of the intensity on a designated axis of a sound radiator at a stated distance r to the intensity that ...
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https://questionanswer.io/what-is-directivity-factor-in-acoustics/
The directivity factor is the ratio of the intensity on a designated axis of a sound radiator at a stated distance r to the intensity that ...
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58
Mic Dictionary - What is directivity index? - DPA Microphones
https://www.dpamicrophones.com/mic-dictionary/directivity-index
Directivity Index. The ratio, expressed in dB, of a microphone's output produced by a plane sound wave arriving in the direction of the reference axis, to the ...
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https://www.dpamicrophones.com/mic-dictionary/directivity-index
Directivity Index. The ratio, expressed in dB, of a microphone's output produced by a plane sound wave arriving in the direction of the reference axis, to the ...
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59
SI units - Underwater Acoustics
http://resource.npl.co.uk/acoustics/techguides/concepts/siunits.html
Directivity index (DI) Directivity factor (D) DI = 10 log D, dB. No reference unit is needed because D is a ratio, For a source: Equation siunits1 ...
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http://resource.npl.co.uk/acoustics/techguides/concepts/siunits.html
Directivity index (DI) Directivity factor (D) DI = 10 log D, dB. No reference unit is needed because D is a ratio, For a source: Equation siunits1 ...
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60
Noise Propagation in Urban Area from Chimneys of Thermal ...
https://easychair.org/publications/preprint_download/g3Jt
received analytical dependence of the sound energy directivity factor from the mouth of pipe and integration of its diffraction.
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https://easychair.org/publications/preprint_download/g3Jt
received analytical dependence of the sound energy directivity factor from the mouth of pipe and integration of its diffraction.
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61
Radio Channel Capacity with Directivity Control of Antenna ...
https://www.mdpi.com/1424-8220/21/24/8296/pdf
This factor describes the relationship between the received signal powers in a multipath propagation environment using narrow-beam antenna ...
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https://www.mdpi.com/1424-8220/21/24/8296/pdf
This factor describes the relationship between the received signal powers in a multipath propagation environment using narrow-beam antenna ...
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62
NAVAL SONAR - Chapter 4
https://maritime.org/doc/sonar/chap4.php
The directivity factor, K, is the ratio of the total energy radiated by a transducer to the energy that would be radiated if the transducer radiated its maximum ...
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https://maritime.org/doc/sonar/chap4.php
The directivity factor, K, is the ratio of the total energy radiated by a transducer to the energy that would be radiated if the transducer radiated its maximum ...
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63
Suppression of side lobe level on the cone characteristics of ...
http://www.conforg.fr/acoustics2008/cdrom/data/articles/001319.pdf
factor in its directivity index and effective aperture. Zvonimir Milosic ... Therefore, the value of directivity index in the receive DIR.
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http://www.conforg.fr/acoustics2008/cdrom/data/articles/001319.pdf
factor in its directivity index and effective aperture. Zvonimir Milosic ... Therefore, the value of directivity index in the receive DIR.
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64
Estimation of directivity and sound power levels emitted by ...
https://eco-profi.info/download_dBA/samolet/001_estimation-of-directivity.pdf
Received 28 March 2006; received in revised form 11 July 2006; ... Measure time histories were also used to calculate the directivity index of noise sources ...
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https://eco-profi.info/download_dBA/samolet/001_estimation-of-directivity.pdf
Received 28 March 2006; received in revised form 11 July 2006; ... Measure time histories were also used to calculate the directivity index of noise sources ...
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65
AES E-Library » More on -Measuring the Directivity Factor...Q-
https://www.aes.org/e-lib/browse.cfm?elib=1925
1 shows the manual computations necessary to obtain the Q at 1000 Hz for the horithe ratios of tho surface area of the spherical quadrangle ...
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https://www.aes.org/e-lib/browse.cfm?elib=1925
1 shows the manual computations necessary to obtain the Q at 1000 Hz for the horithe ratios of tho surface area of the spherical quadrangle ...
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66
A Compact Dual-Band, 9 Circle Receiving Array — Part 1
https://www.pi4cc.nl/tech-info/rx-array/images/NJC-1
and 80 meters, and its receiving directivity factor (RDF)3 on 160 meters is 12.2 dB at. 20° elevation, within about 1 dB of some.
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https://www.pi4cc.nl/tech-info/rx-array/images/NJC-1
and 80 meters, and its receiving directivity factor (RDF)3 on 160 meters is 12.2 dB at. 20° elevation, within about 1 dB of some.
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67
Correction Factor for Power Gain in Antenna Arrays
https://www.scirp.org/journal/paperinformation.aspx?paperid=84375
Combining several antenna elements into an array can yield higher gain and interference suppression. The overall radiation pattern determines directivity of the ...
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https://www.scirp.org/journal/paperinformation.aspx?paperid=84375
Combining several antenna elements into an array can yield higher gain and interference suppression. The overall radiation pattern determines directivity of the ...
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68
Ham Radio Extra Class Exam (Pt.6: Qstns 501-622) Flashcards
https://www.chegg.com/flashcards/ham-radio-extra-class-exam-pt-6-qstns-501-622-72dd915b-8247-408e-9387-03896452b062/deck
Why are received spread spectrum signals resistant to interference? ... D. Take-off angle ... What is Receiving Directivity Factor (RDF)?.
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https://www.chegg.com/flashcards/ham-radio-extra-class-exam-pt-6-qstns-501-622-72dd915b-8247-408e-9387-03896452b062/deck
Why are received spread spectrum signals resistant to interference? ... D. Take-off angle ... What is Receiving Directivity Factor (RDF)?.
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69
Part 3: Antenna Factor - TTI, Inc.
https://www.tti.com/content/dam/ttiinc/manufacturers/tdk/PDF/antenna_paper_part3.pdf
multiply the output voltage of a receiving antenna to obtain or recover the ... However, unlike antenna gain or directivity, the antenna factor is not.
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https://www.tti.com/content/dam/ttiinc/manufacturers/tdk/PDF/antenna_paper_part3.pdf
multiply the output voltage of a receiving antenna to obtain or recover the ... However, unlike antenna gain or directivity, the antenna factor is not.
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70
D : Sound and Vibration Terms and Definitions
https://www.acoustic-glossary.co.uk/definitions-d.htm
Directivity Factor (Q), if a noise source radiates uniformly in all directions, it has a Q = 1. Placing the source on the ground so the energy can only ...
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https://www.acoustic-glossary.co.uk/definitions-d.htm
Directivity Factor (Q), if a noise source radiates uniformly in all directions, it has a Q = 1. Placing the source on the ground so the energy can only ...
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71
Introduction to SONAR
https://man.fas.org/dod-101/navy/docs/es310/uw_acous/uw_acous.htm
This is completely analogous to radar antenna gain, and we have a similar expression in sonar. It is a logarithmic term called the directivity index, DI. It is ...
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https://man.fas.org/dod-101/navy/docs/es310/uw_acous/uw_acous.htm
This is completely analogous to radar antenna gain, and we have a similar expression in sonar. It is a logarithmic term called the directivity index, DI. It is ...
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72
Directivity and Frequency-Dependent Effective Sensitive ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6935507/
In all cases a duty factor of less than 1% was utilized in the ... As frequency increases, the directivity functions get narrower.
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6935507/
In all cases a duty factor of less than 1% was utilized in the ... As frequency increases, the directivity functions get narrower.
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73
A high-directivity receiving antenna for 3.8 MHz - robkalmeijer.nl
https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1993/08/page31/index.html
Fig 3 shows the schematic of the loops. Small, tuned loops generally have low efficiency, but this is not an important factor for receiving at 3.8 MHz. Using ...
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https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1993/08/page31/index.html
Fig 3 shows the schematic of the loops. Small, tuned loops generally have low efficiency, but this is not an important factor for receiving at 3.8 MHz. Using ...
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74
Directivity Index and Multi-element Arrays - Nanopdf.com
https://nanopdf.com/download/directivity-index-and-multi-element-arrays_pdf
Ndirectional noise (ND) is the power of the isotropic noise received by the array. To calculate the Directivity Index of an array,.
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https://nanopdf.com/download/directivity-index-and-multi-element-arrays_pdf
Ndirectional noise (ND) is the power of the isotropic noise received by the array. To calculate the Directivity Index of an array,.
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75
Basics of Sound and Noise Propagation - POWER Magazine
https://www.powermag.com/basics-of-sound-and-noise-propagation/
where Q is the directivity factor (Q = 1 for a point source in full spherical space, such as an airplane flying in the air), ...
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https://www.powermag.com/basics-of-sound-and-noise-propagation/
where Q is the directivity factor (Q = 1 for a point source in full spherical space, such as an airplane flying in the air), ...
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76
Active Wideband Directional Antenna with Vertically Polarized ...
http://www.lz1aq.signacor.com/docs/active-wideband-directional-antenna.php
If we add the signals from the loop and dipole we will obtain a deep ... RDF is Receiving Directivity Factor ,W8JI[16], DMF is Directivity ...
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http://www.lz1aq.signacor.com/docs/active-wideband-directional-antenna.php
If we add the signals from the loop and dipole we will obtain a deep ... RDF is Receiving Directivity Factor ,W8JI[16], DMF is Directivity ...
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77
The experimental and computational determination of the ...
https://ui.adsabs.harvard.edu/abs/1976Freq...30..154L/abstract
The computed radiation pattern is used to obtain the antenna directivity factor, the antenna efficiency, and the antenna gain.
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https://ui.adsabs.harvard.edu/abs/1976Freq...30..154L/abstract
The computed radiation pattern is used to obtain the antenna directivity factor, the antenna efficiency, and the antenna gain.
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78
Antenna Arrays
https://www.waves.utoronto.ca/prof/svhum/ece422/notes/15-arrays2.pdf
unnormalized array factor of such a situation as. AF = 1. (2). Now consider the array shown in Figure 1, which is receiving a signal from a plane wave ...
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https://www.waves.utoronto.ca/prof/svhum/ece422/notes/15-arrays2.pdf
unnormalized array factor of such a situation as. AF = 1. (2). Now consider the array shown in Figure 1, which is receiving a signal from a plane wave ...
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79
Source and Listener Directivity for Interactive Wave-based ...
http://gamma-web.iacs.umd.edu/DIRECTIVITY/docs/paper.pdf
Index Terms—Sound propagation, directivity, spatial sound, ... to directional sources, listeners also do not receive sound equally from all directions.
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http://gamma-web.iacs.umd.edu/DIRECTIVITY/docs/paper.pdf
Index Terms—Sound propagation, directivity, spatial sound, ... to directional sources, listeners also do not receive sound equally from all directions.
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80
(PDF) Vertically Polarized Dipoles and Monopoles, Directivity ...
https://www.academia.edu/48419787/Vertically_Polarized_Dipoles_and_Monopoles_Directivity_Effective_Height_and_Antenna_Factor
In order to calculate the receiving antenna directivity or gain Receiving antenna factor Af is a similar concept as the effec- the logical way is ...
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https://www.academia.edu/48419787/Vertically_Polarized_Dipoles_and_Monopoles_Directivity_Effective_Height_and_Antenna_Factor
In order to calculate the receiving antenna directivity or gain Receiving antenna factor Af is a similar concept as the effec- the logical way is ...
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81
Basics of Fan Noise - AMCA
https://www.amca.org/assets/resources/public/assets/uploads/FINAL-_AMCA_Fan_Noise_RG.pdf
Every person that wants to receive PDH credit must be individually registered. ... Using a given directivity factor (Q=1, 2, 4, 8, etc.) ...
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https://www.amca.org/assets/resources/public/assets/uploads/FINAL-_AMCA_Fan_Noise_RG.pdf
Every person that wants to receive PDH credit must be individually registered. ... Using a given directivity factor (Q=1, 2, 4, 8, etc.) ...
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82
Effect of acoustic environment on the sensitivity of speech ...
https://www.acoustics.asn.au/conference_proceedings/AAS2008/papers/p43.pdf
For a sound source, directivity factor is the ratio of sound ... (the lower limit of 'fair') and higher may represent accept- able intelligibility.
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https://www.acoustics.asn.au/conference_proceedings/AAS2008/papers/p43.pdf
For a sound source, directivity factor is the ratio of sound ... (the lower limit of 'fair') and higher may represent accept- able intelligibility.
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83
Phased-Array Antenna Patterns (Part 2) - Microwaves & RF
https://www.mwrf.com/technologies/systems/article/21138412/analog-devices-phasedarray-antenna-patterns-part-2lineararray-beam-characteristics-and-array-factor
... antenna gain, directivity, and aperture, in addition to array factors. ... Antenna aperture represents an effective area for receiving ...
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https://www.mwrf.com/technologies/systems/article/21138412/analog-devices-phasedarray-antenna-patterns-part-2lineararray-beam-characteristics-and-array-factor
... antenna gain, directivity, and aperture, in addition to array factors. ... Antenna aperture represents an effective area for receiving ...
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84
NIST system for measuring the directivity index of hearing aids ...
https://go.gale.com/ps/i.do?id=GALE%7CA320592500&sid=googleScholar&v=2.1&it=r&linkaccess=abs&issn=1044677X&p=AONE&sw=w
The directivity index is a parameter that is commonly used to characterize the performance of directional hearing aids, and is determined ...
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https://go.gale.com/ps/i.do?id=GALE%7CA320592500&sid=googleScholar&v=2.1&it=r&linkaccess=abs&issn=1044677X&p=AONE&sw=w
The directivity index is a parameter that is commonly used to characterize the performance of directional hearing aids, and is determined ...
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85
Direct and Reverberant Sound
https://www.mtsu.edu/faculty/wroberts/teaching/reverb_4.php
R is the distance in meters from the source to the measurement point, and Q is the directivity factor. Q is a number that indicates the ...
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https://www.mtsu.edu/faculty/wroberts/teaching/reverb_4.php
R is the distance in meters from the source to the measurement point, and Q is the directivity factor. Q is a number that indicates the ...
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86
Antenna and Wave Propagation - Jeppiaar Engineering College
https://jeppiaarcollege.org/jeppiaar/wp-content/uploads/2018/07/EC6602-Antenna-and-Wave-Propagation-QBBatch-2015-2019.pdf
Definition of antenna parameters – Gain, Directivity, Effective aperture, Radiation Resistance, ... Obtain the expression for the field and the radiation.
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https://jeppiaarcollege.org/jeppiaar/wp-content/uploads/2018/07/EC6602-Antenna-and-Wave-Propagation-QBBatch-2015-2019.pdf
Definition of antenna parameters – Gain, Directivity, Effective aperture, Radiation Resistance, ... Obtain the expression for the field and the radiation.
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87
Effects of Element Directivity in Linear-Array Photoacoustic ...
https://irispublishers.com/abeb/fulltext/effects-of-element-directivity-in-linear-array-photoacoustic-imaging.ID.000504.php
Received Date: October 05, 2018; Published Date: October 23, 2018 ... angle between the element i and pixel k. The directivity factor can be expressed as ...
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https://irispublishers.com/abeb/fulltext/effects-of-element-directivity-in-linear-array-photoacoustic-imaging.ID.000504.php
Received Date: October 05, 2018; Published Date: October 23, 2018 ... angle between the element i and pixel k. The directivity factor can be expressed as ...
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88
Acoustic Noise - AMETEK ROTRON
https://www.rotron.com/tech-corn/acousticnoise
The directivity factor Q is defined as the ratio of sound pressure squared ... Since this rating system is very easy to obtain and also correlates well with ...
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https://www.rotron.com/tech-corn/acousticnoise
The directivity factor Q is defined as the ratio of sound pressure squared ... Since this rating system is very easy to obtain and also correlates well with ...
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89
RECEIVING ANTENNAS - Top Band Hams
https://www.topbandhams.com/tech-page/28-receiving-antennas
Receiving Directivity Factor (RDF). RDF is an accurate, proven measure of receiving antenna performance; Forward gain at the desired azimuth and elevation ...
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https://www.topbandhams.com/tech-page/28-receiving-antennas
Receiving Directivity Factor (RDF). RDF is an accurate, proven measure of receiving antenna performance; Forward gain at the desired azimuth and elevation ...
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90
A Game of Numbers (Understanding Directivity Specifications)
https://www.doctorproaudio.com/doctor/cajondesastre/pdfs/brusi_understanding_directivity_game_numbers_doctorproaudio.pdf
given frequency; we get what is commonly referred to as the ... Thus, a spherical source has a Q factor of 1 and a directivity factor of 0 dB, and a.
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https://www.doctorproaudio.com/doctor/cajondesastre/pdfs/brusi_understanding_directivity_game_numbers_doctorproaudio.pdf
given frequency; we get what is commonly referred to as the ... Thus, a spherical source has a Q factor of 1 and a directivity factor of 0 dB, and a.
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91
Directivity of sound radiated from baffled rectangular plates ...
https://eprints.soton.ac.uk/431593/1/Directivity_manuscript_final.pdf
directivity index are introduced that are more appropriate to such plate ... used to obtain the sound pressure radiated from the vibrating ...
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https://eprints.soton.ac.uk/431593/1/Directivity_manuscript_final.pdf
directivity index are introduced that are more appropriate to such plate ... used to obtain the sound pressure radiated from the vibrating ...
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92
Field strength and received power
https://www.giangrandi.org/electronics/anttool/rx-field.shtml
By definition, the gain takes into account the directivity of the antenna and its losses. If significant, any additional loss introduced by the cable or any ...
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https://www.giangrandi.org/electronics/anttool/rx-field.shtml
By definition, the gain takes into account the directivity of the antenna and its losses. If significant, any additional loss introduced by the cable or any ...
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