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ANSI S1.25-1991 (R2007)

American National Standard Specification for Personal Noise Dosimeters

Contains specifications for performance characteristics of personal noise dosimeters that measure the percentage criterion sound exposure. The standard makes provision for three exchange rates: 3 db, 4 db, and 5 db per doubling of exposure time. The standard provides tolerances for the entire instrument including frequency response, exponential averaging (employing SLOW and FAST), threshold, dynamic range, and other characteristics. It specifies that these tolerances be attained by the instrument in a random incidence sound field without the presence of a person wearing the instrument.

Content Provider
Acoustical Society of America [ASA]

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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.