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Evaluating performance with high-frequency emphasis amplification

L W Lee1, L E Humes, G Wilde

  • 1Department of Speech and Hearing Sciences, Indiana University, Bloomington 47405.

Journal of the American Academy of Audiology
|March 1, 1993
PubMed
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Special high-frequency hearing aids offer modest speech recognition improvements for high-frequency hearing loss. Testing in noise is crucial for evaluating these hearing aids effectively.

Area of Science:

  • Audiology
  • Hearing Science
  • Speech-Language Pathology

Background:

  • High-frequency hearing impairment presents challenges for hearing aid fitting due to limited gain.
  • Specialized high-frequency emphasis hearing aids aim to address this limitation.

Purpose of the Study:

  • To evaluate the performance of a commercially available high-frequency emphasis hearing aid.
  • To assess its insertion-gain responses and impact on speech recognition in quiet and noise.

Main Methods:

  • Measured insertion-gain responses of the hearing aid.
  • Assessed speech-recognition performance using nonsense syllables and monosyllabic words (NU6).
  • Evaluated performance in quiet and noisy conditions, both aided and unaided.

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Main Results:

  • Maximum high-frequency gain approximated NAL-R prescription but was lower than other methods.
  • Modest improvements in speech recognition were observed with the hearing aid.
  • Speech materials in noise were more sensitive to performance changes than those in quiet.

Conclusions:

  • High-frequency emphasis hearing aids provide some benefit for individuals with high-frequency impairment.
  • Testing speech recognition in noise is essential for accurate evaluation.
  • Conventional word lists (NU6) are as effective as specialized materials (CUNY NST) for assessing improvements.