Abstract

A psychoacoustic study was performed to determine speech discrimination performance in several noise conditions with the use or non-use of industrial hearing protection. The independent variables included: (1) subject hearing configuration (unoccluded and earplug-, earcap-, or earmuff-occluded), noise intensity level (60, 83 dBA), and noise spectral type (low frequency, white, high frequency). Subjects' hearing level was used as a blocking variable. All factors were found to significantly influence speech discrimination performance, as measured using phoneme scoring. These are discussed in some detail in the paper.

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