On the Use of Ultrasound Transducer Arrays to Account for Time-Variance on Room Acoustics Measurements

Bento Coelho J, Paulo J. On the Use of Ultrasound Transducer Arrays to Account for Time-Variance on Room Acoustics Measurements. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8168. Available from: https://aes.org/publications/elibrary-page/?id=15591

@inproceedings{BentoCoelho2010_15591,
  author = {Bento Coelho, José and Paulo, Joel},
  title = {{On the Use of Ultrasound Transducer Arrays to Account for Time-Variance on Room Acoustics Measurements}},
  booktitle = {AES Convention 129},
  note = {Paper 8168},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15591}
}

TY  - CPAPER
TI  - On the Use of Ultrasound Transducer Arrays to Account for Time-Variance on Room Acoustics Measurements
AU  - Bento Coelho, José
AU  - Paulo, Joel
T2  - AES Convention 129
M1  - Paper 8168
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15591
PB  - Audio Engineering Society
LA  - en
AB  - In real room acoustical measurements, the assumption of time-invariant system is usually not verified. A measurement technique was set-up with the purposes of monitoring the acoustical media, searching for time variance phenomena, for low SNR situations. A probe test signal in the ultrasonic band is sent to the room by using a parametric loudspeaker array, with high polar pattern directivity, simultaneous with the test signal frames. The relevant parameters to establish time-variance and associated thresholds are then estimated from the acquired ultrasonic sound. The valid test signal frames, which pass the thresholds test, are labelled with a weighting factor depending on its significance. Otherwise, the frames are rejected, not entering on the averaging process. Results are presented and discussed herein.
ER  -