The effects of safety gear worn in combination and hearing loss on earmuff attenuation and speech understanding

Authors

  • S.M. Abel University of Toronto, Toronto, Ont. M5S 1Al, Canada
  • A. Sass-Kortsak University of Toronto, Toronto, Ont. M5S 1Al, Canada
  • A. Kielar University of Toronto, Toronto, Ont. M5S 1Al, Canada

Keywords:

Attenuation, Ear protectors, Speech intelligibility, Subjective testing, Earmuff attenuation, Hearing loss, Protective earmuffs, Speech understanding

Abstract

A study was designed to determine whether the wearing of other safety gear in combination would decrease the sound attenuation of hearing protective ear muffs. Each of 24 subjects were tested with the ears unoccluded (UN), and subsequently with Class A earmuffs attached to a hard hat (M), the muffs in combination with safety glasses (MG), the muffs in combination with an air-purifying half-mask respirator (MR), and with the muffs in combination with both the glasses and respirator (MGR). In each listening condition, diffuse field hearing thresholds were measured in quiet for eight one-third octave noise bands with center frequencies ranging from 0.25 to 8 kHz. Consonant discrimination was assessed in quiet (75 dB SPL) and in a background of 80 dB SPL speech spectrum noise. Decrements in attenuation due to the wearing other safety gear in combination with hearing protective ear muffs were no different for normal and hearing-impaired listeners.

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Published

2001-09-01

How to Cite

1.
Abel S, Sass-Kortsak A, Kielar A. The effects of safety gear worn in combination and hearing loss on earmuff attenuation and speech understanding. Canadian Acoustics [Internet]. 2001 Sep. 1 [cited 2021 Oct. 28];29(3):50-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1379

Issue

Section

Proceedings of the Acoustics Week in Canada