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Composite speech spectrum for hearing and gain prescriptions.

R M Cox1, J N Moore

  • 1Memphis Speech and Hearing Center, TN 38105.

Journal of Speech and Hearing Research
|March 1, 1988
PubMed
Summary

A single speech spectrum effectively represents both male and female voices for hearing aid gain prescriptions, particularly in the crucial 250 Hz to 6300 Hz range. This combined spectrum aids in optimizing hearing device fitting.

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Area of Science:

  • Audiology
  • Speech Science

Background:

  • Speech spectra vary between male and female talkers.
  • Accurate speech representation is vital for effective hearing aid fitting.

Purpose of the Study:

  • To determine if a single speech spectrum can represent both male and female talkers for hearing aid gain prescriptions.
  • To compare current speech spectra with historical data.

Main Methods:

  • Generated average long-term RMS 1/3-octave band speech spectra for 30 male and 30 female talkers.
  • Compared these spectra with data from Byrne (1977) and Pearsons et al. (1977).
  • Calculated a weighted average to derive a combined speech spectrum.

Main Results:

  • Male and female speech spectra differed significantly in low and high frequencies but were similar in mid-frequencies.
  • A single spectrum is valid for the 250 Hz to 6300 Hz range crucial for hearing aids.
  • A combined average speech spectrum was derived from weighted data.

Conclusions:

  • A unified speech spectrum is suitable for hearing aid gain prescriptions across sexes within the critical frequency range.
  • The derived combined spectrum offers an improved estimate for hearing aid fitting by integrating multiple datasets.

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