ASA S12.9 PART 3-1993 Quantities and Procedures for Description and Measurement of Environmental Sound Part 3: Short-Term Measurements with an Observer Present
The scope of this standard includes the measurement,with an observer present,of quantities such as equivalent-continuous sound pressure level or sound exposure from a specific source or sourecs at a specified location.These measurements require seveal minutes to several hours to perform;they take less than one day to perform.Measurements may be obtained with standard frequency weighting ,may be frequency filtered in a defined manner,or may be frequency filtered by octave band or fractional octave band filters.This standard specifies procedures to effctively elimate,to the extent possible,the contributions of extraneous background sound from the source-specific measurements.Measurement procedures in this standard require the presence of an instrument operator ,and are nor applicable to measurements by unattended instuments.This standard does not define specific measures or limits for environmental sounds of recommend measurement locations or duration.
ASA S12.9 PART 3-1993 history
2013ASA S12.9 PART 3-2013 American National Standard Quantities and Procedures for Description and Measurement of Environmental Sound - Part 3: Short-term Measurements with an Observer Present
1993ASA S12.9 PART 3-1993 Quantities and Procedures for Description and Measurement of Environmental Sound Part 3: Short-Term Measurements with an Observer Present