Accurate measurement of the acoustic source level of vessels in the Persian Gulf

Document Type : Original Article

Authors

1 -

2 Department of Electrical Engineering, Langarud Branch, Islamic Azad University, Langarud, Iran

3 گروه مهندسی برق، دانشکده فنی، دانشگاه شاهد

Abstract

Calculation of ship sound source level in shallow waters using acoustic propagation models has attracted the attention of many researchers in recent decades. Source level measurement is important because of its wide application in subsurface communication and telecommunications, marine life and biology of marine animals such as whales and dolphins, and many other diverse applications.In this article, we first measure the bandwidth source level in the frequency range of less than 2500 Hz under specific operational and environmental conditions and under a specific standard. Then, the source level was measured for different floats in one-third octave of normal frequencies (25, 63, 125, 250 and 1000 Hz) and the sound transmission loss was calculated using acoustic models. This paper introduces a new modeling technique formulated based on finite difference time domain (FDTD).In this modeling method, factors such as layering of water and bed and depth changes of transmitter and receiver are considered and calculated as inevitable variables in field measurements. This technique can provide a suitable computational approach for standard source level measurement in shallow water.

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Main Subjects


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