Acoustic attenuation in gas mixtures with nitrogen: Experimental data and calculations

Sally G. Ejakov*, Scott Phillips, Yefim Dain, Richard M. Lueptow, Jacobus H. Visser

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


Attenuation in a gas results from a combination of classical attenuation, attenuation from diffusion, and attenuation due to molecular relaxation. In previous papers [J. Acoust. Soc. Am. 109, 1955 (2001); 110, 2974 (2001)] a model is described that predicts the attenuation from vibrational relaxation in gas mixtures. In order to validate this model, the attenuation was measured using a pulse technique with four transducer pairs, each with a different resonant frequency. The attenuation calculated using the model was compared to the measured values for a variety of gases including: air, oxygen, methane, hydrogen, and mixtures of oxygen/nitrogen, methane/nitrogen, carbon dioxide/nitrogen, and hydrogen/nitrogen. After the measured data is corrected for diffraction, the model matches the trends in the measured attenuation spectrum for this extensive set of gas mixtures.

Original languageEnglish (US)
Pages (from-to)1871-1879
Number of pages9
Journaljournal of the Acoustical Society of America
Issue number4 I
StatePublished - Apr 1 2003

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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