Accession Number:

ADA610067

Title:

Measurement of In Situ Acoustic Properties for the ONR Geoclutter Program

Descriptive Note:

Annual rept.

Corporate Author:

NEW HAMPSHIRE UNIV DURHAM CENTER FOR COASTAL AND OCEAN MAPPING (CCOM)

Personal Author(s):

Report Date:

2000-09-30

Pagination or Media Count:

5.0

Abstract:

Our long-term goal is to provide data critical to the assessment of geologic clutterreverberation issues in a seismically and geologically well-characterized shallow-water environment. This will be done within a context of a broad set of experiments aimed at 1- understanding, characterizing, and predicting the lateral and vertical, naturally-occurring heterogeneities that may produce discrete acoustic returns at low grazing angles i.e., geologic clutter in a mid-outer shelf test site off the U.S. New Jersey, and then 2- conducting precise acoustic reverberation experiments at this site in order to understand, characterize, and potentially mitigate the geologic clutter, so that the false alarms, or detects, of tactical sonar systems encountered in this marine geologic environment around the world can be characterized properly. The specific objectives of this program are to develop a means of rapidly measuring in situ sound speed and potentially attenuation in the near surface sediments of the proposed study area. These measurements will be combined with georeferenced core samples to provide a full suite of acoustic measurements that will characterize the near-surface sediments of the Geoclutter area.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE