Hearing Protection and Speech Intelligibility of Two Nonstandard Inflight Communication Headsets.

Abstract

This study evaluated the hearing protection and voice communications effectiveness of two standard earmuff hearing protectors modified to function as voice communications headsets. Both modified units contained the AF standard H-143 inflight receivers and the M-87 noise cancelling boom microphone. Hearing protection and voice communication performance of the modified units were compared to those of the H-157 headset at four intensity levels of a noise spectrum that was generally flat from 63 Hz to 5000 Hz (80, 95, 105, 115 dB 20 microPa. The results showed that the H-157 headset provided more hearing protection than either of the modified headsets, especially in the higher frequencies. The modified headsets provided better speech intelligibility than the H-157 headset. Wearability problems were noted with the modified headsets which may become a problem in the operational situation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1984
Accession Number
ADA146110

Entities

People

  • A. M. Prohaska
  • C. W. Nixon

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical
  • Human Systems

DTIC Thesaurus Topics

  • Air Force
  • Air Force Personnel
  • Attenuation
  • Biomedical Research
  • Classification
  • Frequency
  • Hearing Protection
  • Human Factors Engineering
  • Load Monitoring
  • Measurement
  • Microphones
  • Research Facilities
  • Security
  • Sound Pressure
  • Test And Evaluation
  • Voice Communications
  • Volunteers

Readers

  • Acoustics.