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Active Acoustic Equalization: Performance Bounds for Time-Invariant Systems

Authors:
Hilgemann, F.Fabry, J.Jax, P.
Book Title:
ITG-Fachtagung Sprachkommunikation
Organization:
VDE
Publisher:
VDE
Date:
Sep. 2021
Language:
English

Abstract

In times of rising noise pollution, the demand for active noise control (ANC) in hearable devices continues to increase rapidly. To date, time-invariant feedforward systems constitute a favorable option for their implementation. Recently, active acoustic equalization (AAE) was proposed as a generalization to the feedforward design problem. It facilitates the design of digital filters for various use-cases including ANC- and hear-through-applications. In this contribution, we analyze performance bounds of time-invariant AAE systems and discuss their implications. We build upon techniques which are established in the field of ANC to provide estimates for arbitrary use-cases. The approach facilitates an isolated analysis of individual aspects such as transfer path variance and processing delay.

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