Atmospheric Absorption of Sound: Analytical Expressions

  • H. E. Bass
    University of Mississippi, Department of Physics and Astronomy, University, Mississippi 38677
  • H.-J. Bauer
    University of Mississippi, Department of Physics and Astronomy, University, Mississippi 38677
  • L. B. Evans
    Wyle Laboratories, 7800 Governors Drive, West, Huntsville, Alabama 35807

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<jats:p>A set of analytical expressions has been developed which will predict the absorption of sound in air at 20°C. The results agree within 3% of previous work in the frequency range of 100 Hz 1 MHz for all humidities. Below 100 Hz accuracy cannot be judged because of lack of knowledge about the vibration-vibration energy transfer between CO2 and O2.</jats:p>

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