Analysis Of Nonstandard Noise Dosimeter Microphone Positions
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Analysis Of Nonstandard Noise Dosimeter Microphone Positions

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  • Description:
    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 po sitions measured noise levels under different acoustical condi tions (i.e., diffuse ?eld and direct ?eld). The data presented in this article reject 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 ?eld 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 ?eld were found to be minor for most of the test microphones/locations, while direct ?eld microphone placement effects were found to be quite large depending on the microphone position and supporting structure, sound source location, and noise spectrum.
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