Accession Number : AD0738576

Title :   Tables of Absorption and Velocity of Sound in Still Air at 68 F (20 C).

Descriptive Note : Research rept.,

Corporate Author : WYLE LABS HUNTSVILLE ALA

Personal Author(s) : Evans,L. B. ; Bass,H. E.

Report Date : JAN 1972

Pagination or Media Count : 71

Abstract : Tables are presented for the absorption and velocity of sound in still air at 68F (20C). The absorption is presented in dB/1000 ft, dB/Km, and dB/sec. The velocity is presented in 1000 ft/sec. The tables cover the frequency range of 12 Hz - 1 MHz and for relative humidities of 0% - 100%. An appendix is included which presents analytical expressions that will duplicate the tables within 3% over all frequencies and humidities. (Author)

Descriptors :   (*SOUND TRANSMISSION, ATMOSPHERES), ULTRASONIC RADIATION, ABSORPTION, ATTENUATION, VELOCITY, HUMIDITY, TABLES(DATA)

Subject Categories : Atmospheric Physics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE