Sound Attenuation In A Coarse Granular Medium

✍ Scribed by D. Wu; Z.W. Qian; D. Shao

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 398 KB
• Volume: 162
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1993.1137

✦ Synopsis

In order to investigate the deviation of the spherical particle model from practical granular media in nature, the sound attenuation in a kind of water-saturated riverbed coarse sand was measured in the high frequency range (40-600 \mathrm{kHz}). The results reveal that the rough surface and non-spherical shape factors of the sand particles have strong effects on the acoustic attenuation under experimental conditions in which (\beta \bar{R}) is greater than 60 in the whole frequency range and in which (k \bar{R}) is not far less than 1 when the frequency is higher than 300 or (400 \mathrm{kHz}), where (\beta) is the viscous wavenumber, (k) is the compressional wavenumber and (\bar{R}) is the average radius of the sand particles.