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Unilateral crosstalk cancellation via bone conduction: Methods and evaluation.

Irwansyah1, Sho Otsuka1,2,3, Seiji Nakagawa1,2,3

  • 1Center for Frontier Medical Engineering, Chiba University, Chiba, Japan.

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|October 13, 2023
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Summary
This summary is machine-generated.

This study introduces a new method to reduce sound "crosstalk" in bone conduction hearing aids (BCHAs). An adaptive algorithm creates an anti-signal to cancel unwanted sound transmission, improving binaural hearing for BCHA users.

Keywords:
Adaptive algorithmBone conductionBone transducerCrosstalk cancellationError Sensor-Based Crosstalk Reduction in Bone ConductionHearing threshold

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Area of Science:

  • Audiology
  • Biomedical Engineering
  • Signal Processing

Background:

  • Bone conduction hearing aids (BCHAs) are an alternative for hearing loss due to outer/middle ear issues.
  • Sound "crosstalk" between ears limits binaural hearing benefits with BCHAs, impacting sound localization.
  • Existing BCHA technology faces challenges in achieving effective binaural hearing.

Purpose of the Study:

  • To present a novel method for suppressing bone conduction "crosstalk" within the human head.
  • To enhance binaural hearing performance in individuals using two BCHAs.
  • To develop a personalized crosstalk cancellation technique for BCHAs.

Main Methods:

  • Utilized an adaptive algorithm to control two audiometric bone transducers for crosstalk suppression.
  • Implemented an error sensor near the cochlea (ear canal/mastoid) to estimate a crosstalk compensation filter.
  • Generated an anti-signal via the filter to cancel crosstalk transmission to the non-target ear.

Main Results:

  • Demonstrated a method to actively cancel "crosstalk" in bone conduction hearing aids.
  • Developed a procedure to subjectively measure the efficacy of crosstalk cancellation via hearing thresholds.
  • The adaptive algorithm provides personalized crosstalk cancellation.

Conclusions:

  • The proposed method effectively suppresses "crosstalk" in BCHAs.
  • The technique has the potential to significantly improve binaural hearing and sound localization for BCHA users.
  • Personalized adaptive crosstalk cancellation enhances the functionality of bilateral BCHAs.