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Measured broadband reverberation characteristics in Deep Ocean

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Title Measured broadband reverberation characteristics in Deep Ocean
 
Creator Nair, Baiju M
Padmanabham, M
Ajaikumar, M P
 
Subject Broad band reverberation
Lower cut off frequency
Sound speed profile
1/3 Octave bands
Ray theory
 
Description 62-66
Broad band reverberation measurements
were collected in deep water (2067m) off Vizag. TNT scare charges (0.450 kg)
were used as sound sources which were expended from the ship. The signals were
recorded using two hydrophones deployed from the ship. The sound speed profile
exhibits 63m duct with a limiting ray angle of about 4.47o and lower
cut off frequency of 177 Hz. A flat plateau and then sudden fall of 10 dB near
~12-13s on the reverberation characteristic in deep water is related to the
effect of sound speed profile and water depth. This strong reverberation return
will have major consequences on the reverberation limited sonar performance.
This effect is correlated with ray theory based model and the results are
presented.
 
Date 2014-02-05T09:23:31Z
2014-02-05T09:23:31Z
2014-01
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/26422
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(1) [January 2014]