ASA S1.26-1995 (R2009) American National Standard Method for the Calculation of the Absorption of Sound by the Atmosphere

standard by American National Standards of the Acoustical Society of America, 06/15/2009

Full Description

This Standard provides the means to calculate atmospheric absorption losses of sound from any source, moving or stationary, for a wide range of meteorological conditions. The atmosphere is assumed to be still, homogeneous moist air of normal composition. Non-homogeneous atmospheres may be divided into horizontal layers within which homogeneous conditions may be assumed. Attenuation coefficients for pure-tone sounds are calculated by means of equations (or a table) over ranges of frequency, and the humidity, pressure, and temperature of the atmosphere. For sounds analyzed by fractional-octave- band filters (e.g., one-third-octave- band filters), alternative methods are provided in annexes to calculate the attenuation caused by atmospheric absorption from that specified for pure- tone sounds.

Product Details

Published: 06/15/2009 ANSI: ANSI Approved Number of Pages: 35