Lightweight polymeric sound generator

Robert D. Corsaro

doi:10.1117/12.388252

14 June 2000 Lightweight polymeric sound generator

Robert D. Corsaro

Proceedings Volume 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics; (2000) https://doi.org/10.1117/12.388252
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

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.

Citation Download Citation

Robert D. Corsaro "Lightweight polymeric sound generator", Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, (14 June 2000); https://doi.org/10.1117/12.388252

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