Accession Number:

ADA067391

Title:

Preliminary Report on a Program to Compute Constant Propagation Loss Contours (USL Program Number 0233).

Descriptive Note:

Technical memo.,

Corporate Author:

NAVY UNDERWATER SOUND LAB NEW LONDON CONN

Personal Author(s):

• Einstein,Lloyd T.
• Reis,Arthur G. , Jr

Report Date:

1964-08-18

Pagination or Media Count:

7.0

Abstract:

One of the most difficult problems facing the sonar system designer is the requirement to evaluate system performance under a large variety of circumstances. When hand computations are involved, a parametric study linking the effects of ocean area, source and receiver depths, transmission path, bottom and surface descriptions, anf frequency, soon becomes discouraging, even when time and manpower permit. With this situation in mind, the Theory and Analysis Staff is developing some basic computational tools that will reduce these problems, wherever possible, to their simplest and most direct representations. Several of these programs will deal with propagation loss, and others with array performance, reverberation, and, eventually, system performance. Typical of this effort is a program which models near-surface propagation, according to the AMOS equations. The ability to examine the entire sound field generated by a source at a fixed depth has proved to be a valuable contribution to the problem, even though no new theoretical work was involved.

Descriptors:

• *SONAR SIGNALS
• WAVE PROPAGATION
• SOUND TRANSMISSION
• RANGE(DISTANCE)
• SONAR ECHOES
• TRANSMISSION LOSS
• BOTTOM BOUNCE

Subject Categories:

• Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE