Customer Service:
Mon - Fri: 8:30 am - 6 pm EST


ANSI/ASA S3.1-1999 (R2018)

Maximum Permissible Ambient Noise Levels for Audiometric Test Rooms

This Standard species maximum permissible ambient noise levels (MPANLs) allowed in an audiometric test room that produce negligible masking (2 dB) of test signals presented at reference equivalent threshold levels specied in ANSI S3.6-1996 American National Standard Specication of Audiometers. The MPANLs are specied from 125 to 8000 Hz in octave and one-third octave band intervals for two audiometric testing conditions (ears covered and ears not covered) and for three test frequency ranges (125 to 8000 Hz, 250 to 8000 Hz, and 500 to 8000 Hz). The Standard is intended for use by all persons testing hearing and for distributors, installers, designers, and manufacturers of audiometric test rooms. This standard is a revision of ANSI S3.1-1991 American National Standard Maximum Permissible Ambient Noise Levels for Audiometric Test Rooms.

Content Provider
Acoustical Society of America [asa]

Others Also Bought

Specification for Audiometers
American National Standard Specifications for Instruments to Measure Aural Acoustic Impedance and Admittance (Aural ...
American National Standard for Rating Noise with Respect to Speech Interference
Document History
Included in Packages
This standard is not included in any packages.
Amendments & Corrections
We have no amendments or corrections for this standard.

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.