TY - GEN
T1 - 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 Yazid
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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%.
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%.
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M3 - Conference contribution
AN - SCOPUS:84938825924
T3 - 137th Audio Engineering Society Convention 2014
SP - 210
EP - 223
BT - 137th Audio Engineering Society Convention 2014
PB - Audio Engineering Society
T2 - 137th Audio Engineering Society Convention 2014
Y2 - 9 October 2014 through 12 October 2014
ER -