Sound absorption of sound under interaction among underwater acoustic variable parameters

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (8) : 52-56.

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Sound absorption of sound under interaction among underwater acoustic variable parameters

YANG De-sen, LAN Chao-feng, SHI Sheng-guo, JIANG Wei

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Abstract

investigate the energy transfer under the interaction of nonlinear acoustic variable parameters, the spectrum decomposition is used to study and simulate the amplitude resolution after the interaction of integral multiple frequencies wave in this paper. The results show that: when the high-frequency source level is greater than the low-frequency source level and the high-frequency source level is fixed, the sound absorption decreases as the frequency ratio increases; when the ratio of frequency is not less than 3, the sound absorption effects which are caused by the initial phase relationship between two sound waves can be ignored; As the high-frequency pump source is stronger, the absorption of low frequency sound effects under the high-frequency sound become weaker; in contrast, as the low-frequency pump source is stronger, the absorption of high frequency sound effects under the low-frequency sound become stronger. The cumulative effect of nonlinear is max at the break distance.

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nonlinear variable parameters / interaction of integral multiple frequencies wave / sound absorption of sound

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YANG De-sen;LAN Chao-feng;SHI Sheng-guo;JIANG Wei. Sound absorption of sound under interaction among underwater acoustic variable parameters[J]. Journal of Vibration and Shock, 2012, 31(8): 52-56