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This Standard provides three primary methods for evaluating room noise: a survey method thatemploys the A-weighted sound level; an engineering method that employs expanded noise criteria(NC) curves; and a method for evaluating low-frequency fluctuating noise using room noise criterion(RNC) curves.
American National Standard Electroacoustics - Simulators of human head and ear - Part 8: Acoustic coupler for high-frequency measurements of...
American National Standard for Measurement of Sound Pressure Levels in Airstandard by American National Standards of the Acoustical Society of...
American National Standard Quantities and Procedures for Description and Measurement of Environmental Sound - Part 4: Noise Assessment and Prediction...
Shaft alignment methodology, Part 3: alignment of vertically oriented rotating machinerystandard by American National Standards of the Acoustical Society of...