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Kevin Michael, Ph.D

Michael & Associates, Inc
2766 W. College Ave
Suite 1
State College, PA USA 16801

814.234.7042 office

Testing Services

Michael & Associates, Inc.
An Independent Psychoacoustics Laboratory

ANSI S3.19-1974

According to Environmental Protection Agency (EPA) regulations, ANSI S3.19-1974 is the current testing requirement for hearing protective device labeling. 10 human subjects are required for hearing protector evaluations using 9 test freqiencies. The Noise Reduction Rating (NRR) is calculated from these data. Exact labeling requirements can be seen at: