指定一种分析方法，用于计算各种气象条件下大气吸收导致的声音衰减。对于纯音，大气吸收引起的衰减是根据衰减系数来指定的，衰减系数是声音频率（50 Hz至10 kHz）、温度（-20°C至+50°C）、相对湿度（10%至100%）和空气压力（101325 kPa）的函数。对于更宽的范围（例如超声波频率、更低的压力）和除纯音以外的其他情况，也给出了公式。

Specifies an analytical method of calculating the attenuation of sound as a result of atmospheric absorption for a variety of meteorological conditions. For pure-tone sounds, attenuation due to atmospheric absorption is specified in terms of an attenuation coefficient as a function of the frequency of the sound (50 Hz to 10 kHz), the temperature (- 20 °C to + 50 °C), the relative humidity (10 % to 100 %) and pressure (101,325 kPa) of the air. Formulae are also given for wider ranges (e.g. ultrasonic frequencies, lower pressure) and for other than pure tones.