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ANSI S12.68 : 2007
Superseded
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METHODS OF ESTIMATING EFFECTIVE A-WEIGHTED SOUND PRESSURE LEVELS WHEN HEARING PROTECTORS ARE WORN
Hardcopy , PDF
13-07-2019
English
01-01-2017
1 Scope and Applications
2 Normative references
3 Terms and definitions
4 Measurement of Sound Attenuation of Hearing
Protectors
5 Noise Level Reduction Statistic for Use with
A-Weighting (NRS[A])
6 Noise Level Reduction Statistic, Graphical
(NRS[G])
7 Octave-Band Method
Annex A (normative) - Noise Spectra Used in
Calculating the NRS[A] and NRS[G]
Annex B (informative) - Spreadsheet Illustrating
Calculation and Use of the NRS[A] and
NRS[G]
Annex C (informative) - Example of the Calculation
of the Assumed Protection Values and
the Use of the Octave-Band Method
Annex D (informative) - Calculation of the
Confidence Interval for the NRS[A80]
Bibliography
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