Speed of sound in standard air
作者:
George S. K. Wong,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1986)
卷期:
Volume 79,
issue 5
页码: 1359-1366
ISSN:0001-4966
年代: 1986
DOI:10.1121/1.393664
出版商: Acoustical Society of America
关键词: AIR;SOUND VELOCITY;TEMPERATURE DEPENDENCE;MEDIUM TEMPERATURE;MEDIUM PRESSURE;EQUATIONS OF STATE
数据来源: AIP
摘要:
This paper describes the calculation of a new value for sound speed (c0=331.29 m s−1) in standard dry air at 0 °C and at a barometric pressure of 101.325 kPa. The maximum uncertainty is estimated to be approximately 200 ppm. The theory of the calculation is based on the equation of state, and includes the knowledge of γ/Mwhich is derived from published theoretical and experimental thermodynamic data on the constituents of the standard atmosphere. Investigations which led to the general acceptance of the previous sound speed are examined, and there is good evidence to conclude that, in previous sound speed assessments, the maximum possible uncertainties were sufficient to encompass the above new sound speed. The variation of sound speed with carbon dioxide concentration and temperature is also discussed.
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