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

Vasudha Sathyapriyan, Metin Çalış, Richard C. Hendriks

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


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 publication2021 29th European Signal Processing Conference (EUSIPCO)
Subtitle of host publicationProceedings
Number of pages5
ISBN (Electronic)978-9-0827-9706-0
ISBN (Print)978-1-6654-0900-1
Publication statusPublished - 2021
Event2021 29th European Signal Processing Conference (EUSIPCO) - Virtual at Dublin, Ireland
Duration: 23 Aug 202127 Aug 2021
Conference number: 29th


Conference2021 29th European Signal Processing Conference (EUSIPCO)
Abbreviated titleEUSIPCO 2021
CityVirtual at Dublin


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


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