Accession Number:

ADA008542

Title:

Beamforming for Hydrophone Arrays by Means of Resistors and Operational Amplifiers,

Descriptive Note:

Corporate Author:

CATHOLIC UNIV OF AMERICA WASHINGTON D C CENTER FOR APPLIED RESEARCH

Personal Author(s):

• Harmuth,Henning F.

Report Date:

1975-02-01

Pagination or Media Count:

24.0

Abstract:

The report discusses a low cost method of beamforming for acoustic arrays. It uses mainly resistors and operational amplifiers. The operating frequency band ranges from DC to upward of 100 kHz. The method is presently used to produce 256 beams simultaneously, using the output voltages of a two-dimensional hydrophone array having 16 x 16 hydrophones. The discussion is nonmathematical and is intended to explain the principle. References for a detailed mathematical discussion are given.

Descriptors:

• *BEAM FORMING
• *ACOUSTIC ARRAYS
• FOURIER TRANSFORMATION
• IMAGES
• ACOUSTICS
• HYDROPHONES
• RESISTORS
• OPERATIONAL AMPLIFIERS
• ELECTRIC FILTERS

Subject Categories:

• Acoustic Detection and Detectors
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE