Accession Number:

ADA461296

Title:

Design and Development of a Constant Beamwidth Transducer for Sub-Bottom Acoustic Profiling

Descriptive Note:

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI

Report Date:

1997-01-01

Pagination or Media Count:

7.0

Abstract:

The design, fabrication, and acoustic calibration for a new Constant Beamwidth Transducer CBT is presented. Although designed for a sub-bottom profiling application, the transducer may be used whenever a spatially constant sound beam is desired over a relatively wide frequency range. The CBT design is based on the theoretical work presented earlier by Van Buren et al. 1 and relies on an axis-symmetric velocity distribution acting over a spherically curved surface. The velocity distribution follows a Legendre shading function that is accomplished by dividing the surface electrode pattern into several discrete concentric rings. Design theory, fabrication, and measured results for a prototype transducer are presented.

Subject Categories:

  • Electrical and Electronic Equipment
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE