Development of Attenuation Model for Saturated Water and Sedimentary Deposits for Underwater Acoustic Signal Communication
Sweta S Panchal1, Jayesh P Pabari2, Sandip R Panchal3
1Sweta S Panchal*, Research Scholar, Department of Electronics & Communication Engineering, C U Shah Universtiy, Wadhwan, Gujarat, India.
2Jayesh P Pabari, Researcher, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat, India.
3Sandip R Panchal, Asst. Professor, E & C Engg. Department, Sardar Vallabhbhai Patel Institute of Technology, Vasad, Gujarat, India.
Manuscript received on July 30, 2019. | Revised Manuscript received on August 25, 2019. | Manuscript published on August 30, 2019. | PP: 4374-4378 | Volume-8 Issue-6, August 2019. | Retrieval Number: F8935088619/2019©BEIESP | DOI: 10.35940/ijeat.F8935.088619
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Abstract: In this paper, the model for absorption co-efficient for underwater tank is proposed for medium of raw water concentrated with sodium chloride. With course of time, sediments gets deposited at the bottom of tank. The attenuation model for underwater tank deposited with sediments is also developed. The attenuation models for pure water and sodium chloride are developed separately. The overall model for raw water saturated sodium chloride suitable for bounded shallow underwater medium like tanks. The resultant absorption co-efficient for pure water saturated with sodium chloride can be obtained by summation of the respective models and their percentage concentration. Similarly attenuation model for underwater tank having sedimentary deposits is also developed for various types of sedimentary deposits. For particular operating frequency of communicating devices placed in underwater tank, the absorption of underwater acoustic signal increases. The model reflects the change in attenuation loss as the length of sedimentary deposit increases. The underwater acoustic signal strength gets affected while its transmission in such mediums which can affect received signal strength. Also the length of sedimentary deposits can be related using attenuation model. These models helps to identify the increases concentration of sodium chloride and increases sedimentary deposits by analyzing the received signal strength. 
Keywords: Attenuation co-efficient, Sediments, Transmission loss, Underwater Acoustic communication.