Analysis of Nonstandard Noise Dosimeter Microphone Positions

This study was conducted as part of a project involving the evaluation of a new type of noise exposure monitoring paradigm. Laboratory tests were conducted to assess how "nonstandard" dosimeter microphones and microphone positions measured noise levels under different acoustical conditions...

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Bibliographic Details
Published in:Journal of occupational and environmental hygiene 2008-03, Vol.5 (3), p.197-209
Main Authors: Byrne, David C., Reeves, Efrem R.
Format: Article
Language:English
Subjects:
Acoustics
Acoustics - instrumentation
Adult
dosimeter
Female
Human exposure
Humans
Male
Measuring instruments
microphone
Microphones
Middle Aged
Noise
Noise, Occupational - statistics & numerical data
Occupational Exposure - analysis
Pennsylvania
Sound
Studies
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Summary:This study was conducted as part of a project involving the evaluation of a new type of noise exposure monitoring paradigm. Laboratory tests were conducted to assess how "nonstandard" dosimeter microphones and microphone positions measured noise levels under different acoustical conditions (i.e., diffuse field and direct field). The data presented in this article reflect measurement differences due to microphone position and mounting/supporting structure only and are not an evaluation of any particular complete dosimeter system. To varying degrees, the results obtained with the dosimeter microphones used in this study differed from the reference results obtained in the unperturbed (subject absent) sound field with a precision (suitable for use in an ANSI Type 1 sound level meter) 1 / 2 -inch (12.7 mm) measurement microphone. Effects of dosimeter microphone placement in a diffuse field were found to be minor for most of the test microphones/locations, while direct field microphone placement effects were found to be quite large depending on the microphone position and supporting structure, sound source location, and noise spectrum.
ISSN:1545-9624
1545-9632
DOI:10.1080/15459620701879438