Binaural beam-forming with dominant spatial cue preservation for hearing AIDS

Vasudha Sathyapriyan, Metin Çalış, Richard C. Hendriks

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Many beam-forming algorithms available for hearing aids, preserve both the interaural time differences (ITDs) and the interaural level differences (ILDs) of the interferers. Constraining both the spatial cues over all frequencies will exhaust the degrees of freedom (DoF) available for noise reduction in the filter design. The binaural cues, however, are frequency selective, i.e., the ITDs are dominant in the frequency range below 1.5 kHz and the ILDs are dominant at frequencies above 1.5 kHz. Hence in this paper, we propose two methods to preserve only the ILDs of the interferers, in the higher frequencies, while keeping the target undistorted. Since these formulations are nonconvex, quadratically constrained quadratic programs (QCQPs), an approximate convex relaxation is proposed. The proposed methods preserve the ILDs in the higher frequencies while an available algorithm that preserves interaural transfer function (ITF) of the interferers is used for the lower frequencies. The performance of the methods proposed are evaluated through simulations and the localization performance is validated through informal listening tests.

Original languageEnglish
Title of host publication29th European Signal Processing Conference, EUSIPCO 2021 - Proceedings
Number of pages5
PublisherEuropean Signal Processing Conference, EUSIPCO
Publication date2021
Pages256-260
ISBN (Electronic)9789082797060
DOIs
Publication statusPublished - 2021
Externally publishedYes
Event29th European Signal Processing Conference, EUSIPCO 2021 - Dublin, Ireland
Duration: 23 Aug 202127 Aug 2021

Conference

Conference29th European Signal Processing Conference, EUSIPCO 2021
Country/TerritoryIreland
CityDublin
Period23/08/202127/08/2021
SeriesEuropean Signal Processing Conference
Volume2021-August
ISSN2219-5491

Bibliographical note

Publisher Copyright:
© 2021 European Signal Processing Conference. All rights reserved.

Keywords

  • Binaural beam-forming
  • Convex optimization
  • Interaural level difference (ILD)
  • Noise reduction

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