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Speech audibility for listeners with high-frequency hearing loss.

C W Turner1, K J Cummings

  • 1Syracuse University, NY, USA. Christopher-Turner@uiowa.edu

American Journal of Audiology
|September 28, 1999
PubMed
Summary

For individuals with high-frequency hearing loss, amplifying sounds above 3000 Hz may not improve speech recognition. Benefits are limited when hearing loss exceeds 55 dB HL in these high frequencies.

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Area of Science:

  • Audiology
  • Speech-Language Pathology
  • Hearing Science

Background:

  • High-frequency hearing loss is common and can impact speech understanding.
  • The benefit of audibility in high-frequency regions for speech recognition is not fully understood.
  • Previous research suggests limitations in audibility benefits for certain hearing impairments.

Purpose of the Study:

  • To investigate the limitations on the benefit of audible speech information for listeners with high-frequency hearing loss.
  • To determine if speech recognition improves with increased audibility in high-frequency regions.
  • To compare audibility benefits across different hearing loss configurations.

Main Methods:

  • Speech recognition was tested in 10 listeners with varying degrees of high-frequency hearing loss.
  • Recognition performance was measured across a range of presentation levels.
  • Speech spectrum audibility was compared with pure-tone thresholds.

Main Results:

  • Speech recognition performance reached an asymptote below 100% for all listeners with hearing loss.
  • Audible speech in high-frequency regions (>= 3000 Hz) with hearing loss > 55 dB HL showed little to no improvement.
  • Increased speech audibility in lower frequencies improved recognition for a listener with severe-to-profound flat hearing loss.

Conclusions:

  • Providing amplification for severe high-frequency hearing loss (>= 3000 Hz) may not benefit many individuals.
  • Speech audibility benefits are frequency-dependent and influenced by the degree and configuration of hearing loss.
  • Understanding the limits of audibility is crucial for effective hearing aid fitting and speech rehabilitation strategies.

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