Modeling low-frequency seismo-acoustic propagation in the Arctic using a parabolic equation solution

2012 ◽  
Vol 132 (3) ◽  
pp. 1974-1974
Author(s):  
Adam M. Metzler ◽  
Jon M. Collis ◽  
William L. Siegmann
Keyword(s):  
Parabolic Equation ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
The Arctic ◽  
Equation Solution

Wide-Angle Parabolic Equation Solution of Ocean Acoustic Propagation with Lossy Penetrable Bottom

1999 ◽  
Vol 38 (Part 1, No. 5B) ◽  
pp. 3361-3365 ◽  
Author(s):  
Masuya Hada ◽  
Taro Fujii ◽  
Takenobu Tsuchiya ◽  
Tetsuo Anada ◽  
Nobuyuki Endoh
Keyword(s):  
Parabolic Equation ◽  
Acoustic Propagation ◽  
Wide Angle ◽  
Equation Solution

scholarly journals Characteristics of Low-Frequency Acoustic Wave Propagation in Ice-Covered Shallow Water Environment

2021 ◽  
Vol 11 (17) ◽  
pp. 7815
Author(s):  
Shande Li ◽  
Shuai Yuan ◽  
Shaowei Liu ◽  
Jian Wen ◽  
Qibai Huang ◽  
...  
Keyword(s):  
Parabolic Equation ◽  
Target Detection ◽  
Acoustic Field ◽  
Sound Propagation ◽  
Transmission Loss ◽  
Low Frequency ◽  
Sound Field ◽  
The Arctic ◽  
Long Distance ◽  
Propagation Law

Mastering the sound propagation law of low-frequency signals in the Arctic is a major frontier basic research demand to improve the level of detection, communication, and navigation technology. It is of practical significance for long-distance sound propagation and underwater target detection in the Arctic Ocean. Therefore, how to establish an effective model to study the characteristics of the acoustic field in the Arctic area has always been a hot topic in polar acoustic research. Aimed at solving this problem, a mathematical polar acoustic field model with an elastic seafloor is developed based on a range-dependent elastic parabolic equation theory. Moreover, this method is applied to study the characteristics of polar sound propagation for the first attempt. The validity and effectiveness of the method and model are verified by the elastic normal mode method. Simultaneously, the propagation characteristics of low-frequency signals are studied in a polar sound field from three aspects, which are seafloor parameters, sea depth, and ice thickness. The results show that the elastic parabolic equation method can be well utilized to the Arctic low-frequency acoustic field. The analysis of the influence factors of the polar sound field reveals the laws of sound transmission loss of low-frequency signals, which is of great significance to provide information prediction for underwater submarine target detection and target recognition.

PARABOLIC EQUATION DEVELOPMENT IN RECENT DECADE

1995 ◽  
Vol 03 (02) ◽  
pp. 95-173 ◽  
Author(s):  
DING LEE ◽  
ALLAN D. PIERCE
Keyword(s):  
Parabolic Equation ◽  
Underwater Acoustics ◽  
Low Frequency ◽  
Recent Decade ◽  
Acoustic Propagation ◽  
Early Years ◽  
Future Research ◽  
Research Development ◽  
Scientific Fields ◽  
Made In

Numerous contributions have been made in the enhancement of the Parabolic Equation (PE) approximation method, which has been shown to be a useful tool for solving realistic problems in many different scientific fields. Evidence of its usefulness is the application of PE to solve ocean acoustic propagation problems. In early years, when the PE was introduced to the field of underwater acoustics, its main purpose was to predict long-range, low-frequency acoustic propagations in range-dependent environments; thus, there were certain limitations. In the recent decade, these limitations have been relaxed a great deal due to many useful contributions. The time has come to survey and report these important contributions and to discuss how these contributions enhance the capability of the PE method. This paper gives a brief review of what had been done before 1984 and highlights some important PE developments from 1984 to 1994. Also, some applications of the PE to predict ocean acoustic propagation problems will be presented. We shall call attention to a few important issues related to the PE developments and applications. Looking ahead we will discuss what more a PE can do in order to stimulate future research, development, as well as applications.

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