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Respirator performance ratings for speech intelligibility

K M Coyne1, A T Johnson, G H Yeni-Komshian

  • 1Department of Biological Resources Engineering, University of Maryland, College Park, USA.

American Industrial Hygiene Association Journal
|May 20, 1998
PubMed
Summary
This summary is machine-generated.

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Wearing a respirator significantly impairs speech intelligibility, especially for single words at distances over 9.1 meters. Sentence comprehension remains higher but is still notably reduced when using a respirator.

Area of Science:

  • Audiology
  • Speech-language pathology
  • Human communication

Background:

  • Respirators are essential protective equipment but can impede clear communication.
  • The impact of respirators on speech intelligibility is not fully understood and varies with conditions.

Purpose of the Study:

  • To quantify speech intelligibility degradation caused by respirators under varying conditions.
  • To compare performance with and without respirator use across different distances and message types.

Main Methods:

  • Thirteen speaker-listener pairs with normal hearing and speech participated.
  • Speech intelligibility was tested using single words and sentences at various distances with and without respirators.
  • Performance ratings were calculated and interpolated to assess communication effectiveness.

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Main Results:

  • Speech performance rating was consistently higher for sentences than for single words.
  • At 12.2 meters, sentence comprehension rating was 70% with a respirator.
  • Single-word comprehension rating dropped to 0% beyond 9.1 meters when wearing a respirator.

Conclusions:

  • Respirator use substantially degrades speech intelligibility, particularly for isolated words.
  • Communication effectiveness is significantly distance-dependent and message-dependent when wearing a respirator.
  • These findings highlight challenges in communication for respirator users in various environments.