Rapid In-Place Measurements of Multichannel Venues

Vanderkooy J. Rapid In-Place Measurements of Multichannel Venues. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8233. Available from: https://aes.org/publications/elibrary-page/?id=15655

@inproceedings{Vanderkooy2010_15655,
  author = {Vanderkooy, John},
  title = {{Rapid In-Place Measurements of Multichannel Venues}},
  booktitle = {AES Convention 129},
  note = {Paper 8233},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15655}
}

TY  - CPAPER
TI  - Rapid In-Place Measurements of Multichannel Venues
AU  - Vanderkooy, John
T2  - AES Convention 129
M1  - Paper 8233
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15655
PB  - Audio Engineering Society
LA  - en
AB  - It is often useful to have transfer-function measurements of large venues with an audience present. This precludes multiple chirps or other long-duration signals from being used. This paper studies the use of simultaneous, multiple ‘orthogonal’ maximum-length sequences applied to the loudspeakers, captured by a number of microphones at selected listening positions. Such MLS signals last only a few seconds and are noise-like, being minimally disruptive to an audience, yet they allow full transfer-function system identification between each loudspeaker and microphone. The main detractor of the method is that the effective noise level is high. This paper studies implementation issues, and assesses the S/N of such measurements. It turns out that exciting each loudspeaker separately is usually better than simultaneous excitation, except in special circumstances. An example is shown for the simultaneous measurement of two loudspeakers in a room with two microphones.
ER  -