Optimal Microphone Placement for Single-Channel Sound-Power Spectrum Estimation and Reverberation Effects

Bellows SD, Leishman TW. Optimal Microphone Placement for Single-Channel Sound-Power Spectrum Estimation and Reverberation Effects. J Audio Eng Soc. 2023;71(1/2):20-33. doi:10.17743/jaes.2022.0052

@article{Bellows2023_22028,
  author = {Bellows, Samuel D. and Leishman, Timothy W.},
  title = {{Optimal Microphone Placement for Single-Channel Sound-Power Spectrum Estimation and Reverberation Effects}},
  journal = {Journal of the Audio Engineering Society},
  volume = {71},
  number = {1/2},
  pages = {20--33},
  year = {2023},
  month = jan,
  publisher = {Audio Engineering Society},
  doi = {10.17743/jaes.2022.0052},
  url = {https://doi.org/10.17743/jaes.2022.0052}
}

TY  - JOUR
TI  - Optimal Microphone Placement for Single-Channel Sound-Power Spectrum Estimation and Reverberation Effects
AU  - Bellows, Samuel D.
AU  - Leishman, Timothy W.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 71
IS  - 1/2
SP  - 20
EP  - 33
PY  - 2023
DA  - 2023/01/06
DO  - 10.17743/jaes.2022.0052
UR  - https://doi.org/10.17743/jaes.2022.0052
PB  - Audio Engineering Society
LA  - en
AB  - The sound power produced by an acoustic source comprises its total sound energy radiated in all directions per unit time. As the global emission, it excites the reverberant field of a surrounding room. Conversely, an acoustic signal detected for audio applications, including driving reverberation effects, often results from a microphone at a discrete location that does not capture the global source sound and its sound-power spectrum. This paper explores several physical bases for how measured high-resolution spherical directivity functions and known room conditions allow audio engineers to optimize a microphone position to yield a signal with a mean-squared spectrum best approximating the time-averaged sound-power spectrum. The proposed approaches provide means to capture the global source sound with its attendant audio benefits, including the production of more realistic reverberation effects.
ER  -