A new approach to impulse response measurements at high sampling rates

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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish (US)
Title of host publication137th Audio Engineering Society Convention 2014
PublisherAudio Engineering Society
Pages210-223
Number of pages14
ISBN (Electronic)9781634397483
StatePublished - Jan 1 2014
Event137th Audio Engineering Society Convention 2014 - Los Angeles, United States
Duration: Oct 9 2014Oct 12 2014

Publication series

Name137th Audio Engineering Society Convention 2014

Other

Other137th Audio Engineering Society Convention 2014
CountryUnited States
CityLos Angeles
Period10/9/1410/12/14

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Acoustics and Ultrasonics

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  • Cite this

    Tylka, J. G., Sridhar, R., Boren, B. B., & Choueiri, E. Y. (2014). A new approach to impulse response measurements at high sampling rates. In 137th Audio Engineering Society Convention 2014 (pp. 210-223). (137th Audio Engineering Society Convention 2014). Audio Engineering Society.