A reverberant acoustical system’s transfer function may show deep notches or pronounced peaks, requiring large linear amplification in the play-back system when used, for example, in auralization or for convolution reverb. It is common practice to apply spectral smoothing, with the aim of reducing spectral fluctuation without degrading auditory-relevant information. A procedure referred to as auditory-adapted exponential smoothing (AAS) was proposed earlier, adapted to the spectral properties of the hearing system by implementing frequency-dependent smoothing bandwidths. This contribution presents listening experiments aimed at determining the audibility threshold of auditory-adapted exponential smoothing, which is the maximum amount of spectral smoothing allowed without being audible. As the results depend on the specific acoustic system, parametrization guidelines are proposed.

Authors: Völk, Florian; Fedchenko, Yuliya; Fastl, Hugo
Affiliations: Technische Universität München, München, Germany; WindAcoustics UG (haftungsbeschränkt), Windach, Germany; Technische Universität München, Garching, Germany(See document for exact affiliation information.)
AES Convention: 139 (October 2015) Paper Number: 9371
Publication Date: October 23, 2015 Import into BibTeX
Subject: Transducers/Perception
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=17929

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