Computer Science – Sound
Scientific paper
Jan 1935
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1935natur.135..153b&link_type=abstract
Nature, Volume 135, Issue 3404, pp. 153 (1935).
Computer Science
Sound
1
Scientific paper
IT seems that the velocity of sound has never been measured in liquefied gases at low temperatures, probably because the customary methods were not easily practicable. It appeared reasonable to try as a new method the effect, which has recently been discovered by Debye-Sears and Lucas-Biquard, namely, the scattering of light by ultrasonic waves in liquids and solids. Judging from the results which I have obtained using oxygen as a scattering liquid, this method provides indeed a simple and convenient means for this purpose. The experiments, which were carried out with oxygen of 99.3 percent purity, boiling at atmospheric pressure (705-720 mm. mercury) at - 183.6° C., and with a frequency of 7,500 kilocycles, yielded a sound velocity of 903 m./sec. Taking 1.140 as the density of the liquid, one gets then an adiabatic compressibility of 105.6 × 10-6 cm.2/kgm. The isothermal compressibility may also be calculated; with 3.38 × 10-3 as the value of the differential of the specific volume, and 0.406 as the specific heat at constant pressure, it comes out as 172.0 × 10-6 cm.2/kgm.
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