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Proceedings Paper

Lightweight polymeric sound generator
Author(s): Robert D. Corsaro
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Paper Abstract

A very low-mass sound generator with wide frequency bandwidth is described. It is constructed of four layers of PVDF film configured as a dual bi-laminate bender. The top and bottom bi0laminates are separately formed in a pre- curved press to form a rippled geometry. These two laminates are then attached back-to-back, and flat cover plates are applied. When a voltage is applied, the forced bending of these bi-laminates will generate a net thickness change of the package. Results obtained are shown to be in agreement with the predictions of the numerical model. While the measured displacement is small, useful sound pressure levels can be produced from devices with reasonably large surface areas. These devices are expected to find principal use in aerospace applications, where mass is of crucial importance.

Paper Details

Date Published: 14 June 2000
PDF: 5 pages
Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, (14 June 2000); doi: 10.1117/12.388252
Show Author Affiliations
Robert D. Corsaro, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 3992:
Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

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