𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A multi-purpose facility for research on hearing protection

✍ Scribed by C. Giguère; S.M. Abel

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
842 KB
Volume
31
Category
Article
ISSN
0003-682X

No coin nor oath required. For personal study only.

✦ Synopsis

A BSTRA CT Assessment of the efficacy of personal hearing protectors is based on a wide range of factors, requiring a diversity of experhnental methodologies and acoustic test environments, This paper describes the decelopment of a multipurpose facility which complies with current Canadian and American standards for the measurement of the real-ear attenuation of hearing protectors. The facility also allows for a variety of experiments in auditory perception, including speech intelligibility and sound localization, known tO be particularly relevant in the workplace. Two main features are: ( 1 ) an acoustic test chamber with a modular sound absorption system, and (2) computercontrolled signal presentation and subject monitoring instrumentation..,Is an application of the facility, the attenuation results generated using two psychophysical methodologies, a variation of Bekesy tracking and twointerval forced-choice, were compared for two insert hearing protectors (E-A-R formable foam and Bilsom Soft) and two earmuff~ (E-A-R 3000 and Hellberg No-Noise). The difference due to method was not statistically significant.

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