A new approach to impulse response measurements at high sampling rates

Joseph G. Tylka; Rahulram Sridhar; Braxton B. Boren; Edgar Yazid Choueiri

A new approach to impulse response measurements at high sampling rates

Joseph G. Tylka, Rahulram Sridhar, Braxton B. Boren, Edgar Yazid Choueiri

Mechanical & Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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%.

Original language	English (US)
Title of host publication	137th Audio Engineering Society Convention 2014
Publisher	Audio Engineering Society
Pages	210-223
Number of pages	14
ISBN (Electronic)	9781634397483
State	Published - Jan 1 2014
Event	137th Audio Engineering Society Convention 2014 - Los Angeles, United States Duration: Oct 9 2014 → Oct 12 2014

Publication series

Name	137th Audio Engineering Society Convention 2014

Other

Other	137th Audio Engineering Society Convention 2014
Country	United States
City	Los Angeles
Period	10/9/14 → 10/12/14

All Science Journal Classification (ASJC) codes

Modeling and Simulation
Acoustics and Ultrasonics

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title = "A new approach to impulse response measurements at high sampling rates",

abstract = "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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A new approach to impulse response measurements at high sampling rates. / Tylka, Joseph G.; Sridhar, Rahulram; Boren, Braxton B.; Choueiri, Edgar Yazid.

137th Audio Engineering Society Convention 2014. Audio Engineering Society, 2014. p. 210-223 (137th Audio Engineering Society Convention 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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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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