Low Frequency Broad Band Acoustic Propagation in Andaman Sea
Author(s) -
Nimmi R. Nair,
R. Suganthbalaji,
Elizabeth Shani N. X.,
Pratap V Nair
Publication year - 2019
Publication title -
defence science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.198
H-Index - 32
eISSN - 0976-464X
pISSN - 0011-748X
DOI - 10.14429/dsj.69.14224
Subject(s) - acoustics , geology , amplitude , frequency band , root mean square , seismology , low frequency , sound propagation , physics , engineering , telecommunications , electrical engineering , optics , bandwidth (computing)
During November 2017, an active source seismic survey was performed in Andaman sea to study the acoustic propagation characteristics. High power low frequency acoustic signals generated by 20-air gun array onboard ORV Samudra Ratnagar were recorded from INS Sagardhwani at four different depths within 8 km ranges in shallow and deep waters. Low frequency sound levels were estimated using root mean square and power spectral values. Amplitude levels were analysed with respect to arrival time variation with frequency and is presented.
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