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Evaluation of a multi-channel algorithm for reducing transient sounds.

Mahmoud Keshavarzi1, Thomas Baer1, Brian C J Moore1

  • 1a Department of Psychology , University of Cambridge , Cambridge , UK.

International Journal of Audiology
|May 17, 2018
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Summary
This summary is machine-generated.

The multi-channel transient reduction (MCTR) algorithm effectively reduces annoying transient sounds in speech. Both normal-hearing and hearing-impaired individuals preferred processed sounds, with medium and strong MCTR settings being most favorable.

Keywords:
Hearing aidacoustic annoyancemulti-channel analysispreference judgementtransient noise reduction

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Area of Science:

  • Speech processing
  • Acoustic signal analysis
  • Hearing science

Background:

  • Transient sounds in speech can be annoying and interfere with intelligibility.
  • Existing algorithms for transient reduction require careful parameter selection for optimal performance.
  • The multi-channel transient reduction (MCTR) algorithm aims to address these challenges.

Purpose of the Study:

  • To evaluate and select optimal parameters for the multi-channel transient reduction (MCTR) algorithm.
  • To assess the effectiveness of MCTR in detecting and attenuating transient sounds in speech.
  • To determine user preference for MCTR-processed speech across different settings.

Main Methods:

  • Participants listened to sentences with and without MCTR processing, comparing transient audibility and annoyance.
  • Two groups of participants were tested: 10 with normal hearing and 10 with mild-to-moderate hearing impairment.
  • MCTR processing strength was varied (weak, medium, strong) to assess parameter impact.

Main Results:

  • Both normal-hearing and hearing-impaired participants preferred MCTR-processed speech over unprocessed speech.
  • For hearing-impaired participants, medium and strong MCTR settings were significantly preferred over the weak setting.
  • MCTR processing successfully reduced transient annoyance while preserving audibility.

Conclusions:

  • The MCTR algorithm is effective in reducing the annoyance of transient sounds in speech.
  • Medium and strong MCTR settings provide the best balance between transient reduction and audibility.
  • The MCTR algorithm shows promise for improving speech perception for individuals with hearing impairments.