In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 83, No. S1 ( 1988-05-01), p. S118-S118
Abstract:
In this paper, the results of a theoretical investigation into the effects of various factors including dispersion, attenuation, and range on the duration of transients in shallow water ocean environments are presented. An acoustic source with the time history s(t;ω) = 0 for t & lt; 0 and sin (ωt) for t & gt; 0 is placed in the ocean several kilometers from a receiver. The duration of the transient is the amount of time between the first arrival and the achievement of a time harmonic state at the receiver. Using. a range-dependent time domain model developed at NORDA, the Klein-Gordon equation is solved to obtain the received signal P(t;v) due to the Gaussian source S(t;v) = exp[ − (vt)2]. Then, P(t;v) is convolved to obtain the reponse p(t;ω) due to s(t;ω). Qualitatively, one would expect transient duration to increase with dispersion and range and to decrease with attenuation. A presentation of quantitative results to illustrate these relationships and discuss the possibility of the use of transient duration to solve inverse problems will be given. [Work supported by ONR and NORDA.]
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1988
detail.hit.zdb_id:
1461063-2
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