Accession Number:

ADA018052

Title:

Design Theory for a Constant-Beamwidth Transducer,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Trott,W. James

Report Date:

1975-11-14

Pagination or Media Count:

13.0

Abstract:

Design theory is presented for constructing an underwater acoustic transducer piezoelectric having a frequency-independent directivity index. The transmitting current response is shown to be constant above a low-frequency limit. Bandwidths of several decades can be achieved for application to surveillance tracking, communication, bottom mapping, mine detection, or target identification. Theoretical design data are presented graphically.

Descriptors:

• *Sonar transducers
• *Acoustic detectors
• *Piezoelectric transducers
• Hydrophones
• Underwater sound
• Mathematical models
• Numerical analysis
• Legendre functions

Subject Categories:

• Test Facilities, Equipment and Methods
• Acoustic Detection and Detectors
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE