TRANSDUCER POWER OUTPUT OBTAINED FROM NEAR-FIELD PRESSURE AMPLITUDE AND PHASE MEASUREMENTS
PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB
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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.
- Acoustic Detection and Detectors