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Acoustic equalization for headphones using a fixed feed-forward filter

Authors:
Fabry, J. ,  König, F. ,  Liebich, S.Jax, P.
Book Title:
Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
Organization:
IEEE
Publisher:
IEEE
Pages:
p.p. 980-984
Date:
May. 2019
DOI:
10.1109/ICASSP.2019.8682167
Language:
English

Abstract

The headphones market is expanding and new applications based on active noise control (ANC) are emerging. In this contribution, we derive a fixed feed-forward FIR filter for ANC headphones based on a minimum mean-square error (MMSE) cost function that real- izes user-defined active equalization and attenuation of the ambient sound. By analyzing the limit of this solution with respect to active attenuation, we derive a generalized solution that allows the user to influence the equalization even for high attenuation. We investigate the importance of a priori information and runtime measurements of the acoustic transfer functions, and show how this can be utilized to further increase the accuracy of the equalization.

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