| MENG JINSHENG,GUAN DINGHUA. 1985. ESTIMATION OF THE ATTENUATION OF SOUND IN MARINE SEDIMENTS BY NORMALLY-INCIDENT PULSES. Acta Oceanologica Sinica, (4):503－509 |
| ESTIMATION OF THE ATTENUATION OF SOUND IN MARINE SEDIMENTS BY NORMALLY-INCIDENT PULSES |
| ESTIMATION OF THE ATTENUATION OF SOUND IN MARINE SEDIMENTS BY NORMALLY-INCIDENT PULSES |
| Received:May 05, 1984 Revised:January 08, 1985 |
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| Abstract: |
| A method of remote sensing of attenuation coefficient of sound wave in marine sediments is proposed in this paper.Under certain conditions the echo envelope has an exponential decay EXP(-βCt).When the frequency is high enough,the exponential decay would be the dominant factor in the shape of the echo envelope.Therefore,the attenuation coefficient can be estimated from the envelope.The echo as a function of time is deduced on the basis of a small-scale layering model of marine sediments.The deduction can be regarded as a description of the mechanism of the volume-scattering of high-frequency sound in marine sediment.Experiments at sea are described,and the results are given. |
| 中文摘要: |
| A method of remote sensing of attenuation coefficient of sound wave in marine sediments is proposed in this paper.Under certain conditions the echo envelope has an exponential decay EXP(-βCt).When the frequency is high enough,the exponential decay would be the dominant factor in the shape of the echo envelope.Therefore,the attenuation coefficient can be estimated from the envelope.The echo as a function of time is deduced on the basis of a small-scale layering model of marine sediments.The deduction can be regarded as a description of the mechanism of the volume-scattering of high-frequency sound in marine sediment.Experiments at sea are described,and the results are given. |
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