Research Of Acoustic Properties And In-situ Measurement Method Of Seafloor Sediments

The acoustic properties (mainly mentioned for compression wave speed and attenuation coefficient) research of seafloor sediments has a great sense to marine military and marine acoustic field. There are two methods for the measurement of acoustic speed and attenuation coefficient, the first is measure after sample; the other is in-situ measurement. In-situ measurement is being used more popular since measure after sample has fundamental limitation, such as disturbance as collecting.External scientists have began to research the acoustic properties of seafloor sediments since the 50s 20th, and have been made many scientific payoffs. In the beginning of the 90s 20th, many seafloor sediment acoustic properties measurement apparatuses come out reciprocally, which develop the efficiency and accuracy of acoustic properties measurement of seafloor sediments greatly. While in china, the research in this field is weak, so much work in this field is needed urgently to give technical supply to the seafloor sediments acoustic properties research.In this paper, we analyze the research of seafloor sediments acoustic properties and the development of in-situ measurement technique. According to the properties of seafloor sediments, we study and develop in-situ measurement technique of seafloor sediments. With the in-situ measurement system we develop, we take experiments in many different kinds of sediments in laboratory and sea beach, and the data obtained proved the system we develop can measure acoustic speed and attenuation coefficient of seafloor sediments effectively.In summary, we obtain some results below: 1) Propose new method of measuring acoustic speed and attenuation coefficient of seafloor sediments;2) Develop in-situ measurement system of acoustic speed and attenuation coefficient of seafloor sediments;3) With the data obtained, research the acoustic properties of seafloor sediment preliminary.