On Optimal Frequencies of Acoustic in-situ Detector for Seafloor Hydrothermal Vents  

作　　者：樊炜 潘华辰 潘依雯 吴民忠 陈鹰 

机构地区：[1]The State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University [2]Institute of Electromechanical Engineering,Hangzhou Dianzi University [3]Department of Earth Sciences,Zhejiang University

出　　处：《China Ocean Engineering》2010年第2期343-351,共9页中国海洋工程（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(863 Program,Grant No.2007AA09Z213);the National Natural Science Foundation of China(Grant No.40637037);the Science and Technology Program of Zhejiang Province for Qianjiang Professional People(Grant No.2008R10020)

摘　　要：The approach to determine working frequencies of acoustic in-situ detector for seafloor hydrothermal fluid is presented. Based on the research of deep-sea noise and the sound generated by mid-ocean ridge black smoker hydrothermal vents, and on the hydrothermal-vent animal hearing ranges, coupled with influences of suspended particles of hydrothermal on acoustic attenuation under different frequencies, the optimal frequency range for detection of acoustical signal near black smokers is determined. The optimal frequencies providing the maximum ratio of receiver signal to background noise are obtained. We have developed a laboratory experimental setup for the optimal frequencies selection. In particular, we evaluated time-of-flight performance with respect to the source signal parameters of center frequency and bandwidth. The experimental results confirm the effectiveness of our approach. Current results indicate that individual transducers operated in the range of 18 - 25 kHz are immune to most interfering sounds and suitable for our system.The approach to determine working frequencies of acoustic in-situ detector for seafloor hydrothermal fluid is presented. Based on the research of deep-sea noise and the sound generated by mid-ocean ridge black smoker hydrothermal vents, and on the hydrothermal-vent animal hearing ranges, coupled with influences of suspended particles of hydrothermal on acoustic attenuation under different frequencies, the optimal frequency range for detection of acoustical signal near black smokers is determined. The optimal frequencies providing the maximum ratio of receiver signal to background noise are obtained. We have developed a laboratory experimental setup for the optimal frequencies selection. In particular, we evaluated time-of-flight performance with respect to the source signal parameters of center frequency and bandwidth. The experimental results confirm the effectiveness of our approach. Current results indicate that individual transducers operated in the range of 18 - 25 kHz are immune to most interfering sounds and suitable for our system.

关 键 词：optimal frequencies in-situ detector hydrothermal vents DEEP-SEA 

分 类 号：P716.4[天文地球—海洋科学]