Abstract
This paper briefly describes the construction and test results of an ultrasonic sound probe used for measuring the particle velocity at the face of elements in a hydrophone array. The problems of Fresnel zone interference and field disturbances make near-field measurements of pressure difficult to interpret. The sound probe described overcomes these difficulties by measuring the particle velocity. This is accomplished by proper mechanical and electrical loading. Comparison of the results is shown by use of velocity probes and pressure probes.
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