Patent ID: 7615912
Filing Date: 2009-11-10
Classification: H01L,H04R

Abstract:
1. An electroacoustic transducer comprising: a tail mass having a body extending between a first end and a second end, said body having a cavity with a cavity wall, said cavity extending from said first end towards said second end; a head mass having a head and an elongated shaft attached to and extending from said head, said shaft having a shaft axis and being located at least partially within said cavity of said tail mass; a radiating face, said radiating face being said head mass; at least two parallelepiped shaped piezoelectric material elements disposed between and attached to said shaft and said head mass, each of said elements being made from a piezoelectric material having a non-zero d said elements each having a shaft surface adjacent said shaft, an oppositely disposed cavity surface adjacent said cavity wall, a head surface proximate to and facing said head of said head mass and an oppositely disposed tail surface, and a pair of oppositely disposed face surfaces that extend between said shaft surface to said cavity surface and said head surface to said tail surface; and a first electrode in electrical contact with one of said element surfaces and a second electrode in electrical contact with one of said element surfaces that is oppositely disposed from said first electrode, said first and second electrodes operable to apply an electric field therebetween.