Equal-loudness contours represent the sound-pressure-level-dependent frequency response of the auditory system, which implies an arbitrary change in the perceived spectral balance of a sound when the sound-pressure-level is modified. The present paper postulates an approximate proportional relationship between loudness and sound-pressure-level, permitting relative loudness modification of an audio signal while maintaining a constant spectral balance without an absolute sound-pressure-level reference. A prototype implementation is presented and accessible at [1]. Preliminary listening tests are performed to demonstrate the benefits of the described method.

Authors: Hawker, Oliver; Wang, Yonghao
Affiliation: Birmingham City University, Birmingham, UK
AES Convention: 139 (October 2015) Paper Number: 9373
Publication Date: October 23, 2015
Subject: Transducers/Perception

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