Influence of a Table on a Microphone’s Frequency Response and Directivity

Zidan HEB, Svensson UP. Influence of a Table on a Microphone’s Frequency Response and Directivity. J Audio Eng Soc. 2013;61(1/2):70-74. Available from: https://aes.org/publications/elibrary-page/?id=16669

@article{Zidan2013_16669,
  author = {Zidan, Hassan El-Banna and Svensson, U. Peter},
  title = {{Influence of a Table on a Microphone’s Frequency Response and Directivity}},
  journal = {Journal of the Audio Engineering Society},
  volume = {61},
  number = {1/2},
  pages = {70--74},
  year = {2013},
  month = jan,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16669}
}

TY  - JOUR
TI  - Influence of a Table on a Microphone’s Frequency Response and Directivity
AU  - Zidan, Hassan El-Banna
AU  - Svensson, U. Peter
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 61
IS  - 1/2
SP  - 70
EP  - 74
PY  - 2013
DA  - 2013/01/06
UR  - https://aes.org/publications/elibrary-page/?id=16669
PB  - Audio Engineering Society
LA  - en
AB  - Teleconferencing applications often use a microphone placed directly on the table surface. A boundary or pressure zone microphone has its membrane mounted so close to a sound-reflecting plane that the membrane receives direct and reflected sounds in phase at all frequencies of interest, thereby avoiding destructive phase interference. However, in typical applications with small tables or a podium surface, a more detailed model is required to determine if the planar boundary assumption is still valid. Diffraction at the surface edges might significantly affect the frequency response. A comparison between the calculated and measured frequency responses indicate that the simulation gives 1/3 octave-band levels that are typically within 1 dB of measured values. As expects, the response from a small table is less uniform than for a large table.
ER  -