By Topic

Measuring the directivity index of underwater sound projectors

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Green, R. ; Naval Research Laboratory, Orlando, Fla

The directivity index Diof an underwater sound source usually is approximated because of the difficulty involved in performing the required power measurements and integrating over all angles. A simulation study conducted at the Underwater Sound Reference Division resulted in a model of a Dimeasuring system that minimizes the complexity of measuring the power profile about a sphere with accuracy to within ±0.1 dB. A system was assembled in accordance with the model and experimental measurements have been made in a shallow lake. The instrumentation and measurement techniques are presented in this paper. A complete three-dimensional power profile can be obtained in approximately 10 min running time with conventional hardware. Measured values of Diare in close agreement with theoretical calculations based on a perfect piston raditors, except for patterns with significant sidelobes.

Published in:

Audio and Electroacoustics, IEEE Transactions on  (Volume:21 ,  Issue: 5 )