Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration

Cengarle G, Mateos T. Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration. In: AES Convention 136. Audio Engineering Society; 2014. Paper 9083. Available from: https://aes.org/publications/elibrary-page/?id=17229

@inproceedings{Cengarle2014_17229,
  author = {Cengarle, Giulio and Mateos, Toni},
  title = {{Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration}},
  booktitle = {AES Convention 136},
  note = {Paper 9083},
  year = {2014},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17229}
}

TY  - CPAPER
TI  - Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration
AU  - Cengarle, Giulio
AU  - Mateos, Toni
T2  - AES Convention 136
M1  - Paper 9083
PY  - 2014
DA  - 2014/04/06
UR  - https://aes.org/publications/elibrary-page/?id=17229
PB  - Audio Engineering Society
LA  - en
AB  - When measuring the response of a loudspeaker by averaging multiple points in a room, the results typically vary according to the number of microphones employed and their positions. We present an interpretation of the average procedure that shows that averaging converges to a compromise response over the relevant listening area, at a rate inverse to the square root of the number of microphones employed. We then provide real-world examples by performing measurements in a dubbing stage and a cinema theater, and analyzing the variations of average frequency responses over a large set of different microphone number and positioning. Results confirm the predicted scaling of the deviations and quantify their magnitude in typical rooms. The data provided helped to establish the point of diminishing returns in number of microphones.
ER  -