Patent ID: 6349141
Filing Date: 2002-02-19
Classification: H04R

Abstract:
An acoustic transducer comprising:a pair of members, each of said members comprising at least one layer and having distal opposite ends and a central portion therebetween, said at least one layer of each of said members being of active electro-acoustic material, each of said members having inner and outer surfaces with a first electrode affixed to each outer surface of each of said members and a second electrode affixed to each inner surface of each of said members; wherein each of said members extends along an elongate length, each of said members being affixed to one another at their respective distal opposite ends along said length and wherein said members thereby define a space therebetween having a volume; and wherein said central portion of at least one of said members is convex, said central portion of each of said members defines a space therebetween having a volume, and at least one of said first and second electrodes are confined to urge upon activation at least one of said members to move with respect to the other of said members and thereby change volume of said space between said members during vibration of said at least one activated member.