A New Approach to Impulse Response Measurements at High Sampling Rates

Tylka JG, Sridhar R, Boren BB, Choueiri E. A New Approach to Impulse Response Measurements at High Sampling Rates. In: AES Convention 137. Audio Engineering Society; 2014. Paper 9183. Available from: https://aes.org/publications/elibrary-page/?id=17506

@inproceedings{Tylka2014_17506,
  author = {Tylka, Joseph G. and Sridhar, Rahulram and Boren, Braxton B. and Choueiri, Edgar},
  title = {{A New Approach to Impulse Response Measurements at High Sampling Rates}},
  booktitle = {AES Convention 137},
  note = {Paper 9183},
  year = {2014},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17506}
}

TY  - CPAPER
TI  - A New Approach to Impulse Response Measurements at High Sampling Rates
AU  - Tylka, Joseph G.
AU  - Sridhar, Rahulram
AU  - Boren, Braxton B.
AU  - Choueiri, Edgar
T2  - AES Convention 137
M1  - Paper 9183
PY  - 2014
DA  - 2014/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17506
PB  - Audio Engineering Society
LA  - en
AB  - High sampling rates are required to fully characterize some acoustical systems, but capturing the system's high-frequency roll-off decreases the signal-to-noise ratio (SNR). Band-pass filtering can improve the SNR but may create an undesirable pre-response. An iterative procedure is developed to measure impulse responses (IRs) with an improved SNR and a constrained pre-response. First, a quick measurement provides information about the system and ambient noise. A second, longer measurement is then performed, and a suitable band-pass filter is applied to the recorded signal. Experimental results show that the proposed procedure achieves an SNR of 37 dB with a peak pre-response amplitude of <0.2% of the IR peak, whereas a conventional technique achieves an SNR of 32 dB with a peak pre-response amplitude of 16%.
ER  -