Document Type

Article

Publication Date

2-2013

Publication Title

American Journal of Physics

Abstract

The acoustic intensity vector field around a tuning fork is investigated. Theory for a longitudinal quadrupole source predicts a well-defined transition between near-field and far-field, with significant circulation of sound energy in the near-field. Vector components of the time-averaged intensity were measured using a two-microphone intensity probe and found to agree well with predictions from theory. The vector intensity map is interpreted, and shown to provide useful information about the near-field of an acoustic source.

Volume

81

Issue

2

First Page

99

Last Page

103

DOI

http://dx.doi.org/10.1119/1.4769784

ISSN

1943-2909

Rights Statement

© 2013 American Journal of Physics, posted with permission

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