Averaged Sound Transmission in Range-Dependent Channels.

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Abstract:

An integral formula is derived as an estimate of the averaged, steady-state transmission ratio for two points in a channel where the environmental parameters vary slowly with range. The derivation is based on the theory of ray acoustics with lossy specular reflection from the boundaries. The averaging eliminates all but gradual changes with range of the transmission loss TL dependence on the depth of each point is retained. The formulation is applied to an isogradient channel with constant bottom slope analytical approximations for TL are derived. Author

Author(s):
Smith, Preston W., Jr
Author Organization(s):
BOLT BERANEK AND NEWMAN INC CAMBRIDGE MASS
Descriptive Note:
Final rept.,
Pagination:
0067

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
BBN-2320
Contract/Grant Number(s):
N00014-69-C-0022
 Subject Terms
Joint Capability Areas:
JCA_6.1_Information Transport; JCA_6_Net Centric
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*UNDERWATER SOUND, SOUND TRANSMISSION), INTEGRAL EQUATIONS, ANALYTIC GEOMETRY, APPROXIMATION(MATHEMATICS), SNELLS LAW, CURVE FITTING, ATTENUATION
Field(s)/Group(s):
Acoustic Detection and Detectors, Acoustics
Keyword(s):
RAY TRACING
Report Date:
1972 Jan 28