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ANSI/ASA S1.25

91st Edition, October 24, 1991

Complete Document

American National Standard Specification for Personal Noise Dosimeters

Includes all amendments and changes through Reaffirmation Notice , March 20, 2017


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Active, Most Current

EN
Additional Comments:
SAME AS ASA 98
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Product Details:

  • Revision: 91st Edition, October 24, 1991
  • Published Date: March 20, 2017
  • Status: Active, Most Current
  • Document Language: English
  • Published By: Acoustical Society of America (ASA)
  • Page Count: 18
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:

This standard specifies certain characteristics of a personal noise dosimeter. It also specifies allowable tolerances of those characteristics, and it describes how those characteristics are to be verified. It provides for three different exchange rates, two frequency weightings, and two exponential averaging time constants.

NOTE: At present, the regulatory practices of the U.S. Department of Labor Occupational Safety and Health Administration (OSHA) specify use of dosimeters having A-weighting, 5 dB exchange rate and SLOW exponential time averaging. The U.S. Department of Defense practices specify A-weighting, 4 dB exchange rate and SLOW exponential time averaging.

Other options including C-weighting, 3 dB exchange rate and FAST exponential time averaging are included to provide instrument standards to serve the needs of research and developing regulatory practices. International Organization for Standardization Standard 1999: 1990 for occupational noise specifies only A-weighted sound exposure with 3 dB exchange rate and with no exponential time averaging.

This standard is intended to specify a dosimeter suitable for measurement of impulsive, intermittent, and continuous noise.