Accession Number:

AD0274098

Title:

AN ANALYSIS OF ECHOES FROM A SOLID ELASTIC SPHERE IN WATER

Descriptive Note:

Corporate Author:

CALIFORNIA INST OF TECH PASADENA

Personal Author(s):

Report Date:

1962-03-01

Pagination or Media Count:

44.0

Abstract:

IT IS WELL-KNOWN IN SONAR WORK THAT THE PULSE FORM OF A DIRECT ECHO FROM A TARGET BEARS LITTLE RELATION TO THE FORM OF THE ORIGINAL SIGNAL. This is true even for regularly shaped bodies, such as a sphere. In this study, the case of a homogeneous elastic sphere in water is examined theoretically and it is shown, in comparison with experimental results, that the observed effects originate from vibrations induced in the sphere by the incident sound. Calculated results are presented for a variety of solid materials, and it seems that echo forms could possibly provide information about the size and constitution of a sonar target.

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE