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Methods for Extending Room Impulse Responses Beyond Their Noise Floor

Two methods of extending measured room impulse responses below their noise floor and beyond their measured duration are presented. Both methods extract frequency-dependent reverberation energy decay rates, equalization levels, and noise floor levels, and subsequently extrapolate the reverberation decay towards silence. The first method crossfades impulse response frequency bands with a late-field response synthesized from Guassian noise. The second method imposes the desired decay rates on the original impulse response bands. Both methods maintain an identical impulse response prior to the noise floor arrival in each band and seamlessly transition to a natural sounding decay after the noise floor arrival.

Authors: Abel, Jonathan S.; Bryan, Nicholas J.
Affiliation: Center for Computer Research in Music and Acoustics, Department of Music, Stanford University, Stanford, CA, USA
AES Convention:129 (November 2010) Paper Number:8167 Import into BibTeX
Subject:Acoustical Measurements

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