Abstract:

Recent experimental studies have indicated that injection molded 1--3 piezocomposite is suited for parametric mode sound generation. Using a new Navy calibration standard (F82), which relies on the 1--3 composite for the active layer, the authors were able to drive the projector at sufficient power levels and measure difference frequency sound fields comparable to conventional diced PZT-based transducer designs. Although the particular 1--3 composite used in the experiment had a low primary mode efficiency, (10 (mu)Pa) were realized at a difference frequency of 50 kHz for very modest electric fields (1.5 V/mil). The subject presentation will describe the experimental results as well as include a discussion of modeling issues, and related predicted results. Suggestions will be made for improving the injection molded composite efficiency. [Work supported by NRaD Code D744.]