Spherical acoustic resonators for thermophysical property and standards measurements

Michael R. Moldover, James B. Mehl
1982 Journal of the Acoustical Society of America  
A theoretical and experimental study is reported of the advantages and limitations of using the acoustic radial resonances in a spherical cavity to obtain thermophysical property data in dilute gases. The velocity of sound in dilute gases (0· 1-0· 5 MPa) is now measured with an accuracy of O · 02% and a precision of O · 001 %, and a significant increase in accuracy is anticipated. The measurements are at sufficiently low frequencies (3-15 kHz) to be of value in determining thermophysical
more » ... ermophysical properties in many polyatomic gases.
doi:10.1121/1.2019734 fatcat:bmo44ldgrzcilfbc7xo7pqw22u