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Design of IIR Filters for Active Noise Control by Constrained Optimization

Authors:
Hilgemann, F.Fabry, J.Jax, P.
Book Title:
Proceedings of European Signal Processing Conference (EUSIPCO)
Organization:
EURASIP
Pages:
p.p. 151--155
Date:
Aug. 2021
DOI:
10.23919/EUSIPCO54536.2021.9616172
Language:
English

Abstract

In the rapidly growing hearables market, active noise control (ANC) is a feature that customers increasingly demand. In this contribution, we present a design procedure for time-invariant infinite impulse response (IIR) feedforward filters for ANC applications. The filter minimizes a perceptually motivated cost function and can be computed using a nonlinear optimization solver. The design procedure yields filters thatrealize a user-defined active attenuation in the presence of constraints regarding stability and filter magnitude response. We verify the presented approach through simulation and real-time measurements for several design examples. Furthermore, we relate the achieved performance to an upper bound and investigate the impact of the constraints on the resulting performance

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