Accession Number:

AD0295634

Title:

TRANSDUCER POWER OUTPUT OBTAINED FROM NEAR-FIELD PRESSURE AMPLITUDE AND PHASE MEASUREMENTS

Descriptive Note:

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB

Personal Author(s):

Report Date:

1963-02-01

Pagination or Media Count:

22.0

Abstract:

The calculation of acoustic power from near-field measurements of piston-type transducers is described, and the results are compared with those calculated from far-field measurements under the same conditions. The near- field measurements, which are required when transducers are calibrated in small- volume pressure tanks, are of two types axial-pressure measurements, and radial-pressure measurements in a plane near the active face. It is shown that the axial pressure method is superior for reasons of simplicity in measurement and calculation.

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE