Patent ID: 6563930
Filing Date: 2003-05-13
Classification: H04R,Y10T

Abstract:
A speaker, comprising:a substantially semi-spherical vibrating section defined by a rigid substantially semispherical body having a substantially semispherical inner surface and a substantially semispherical outer surface; a plurality of driving electrodes for vibrating said vibrating section, a first of the plurality of driving electrodes being provided on and supported by the substantially semispherical inner surface of the rigid substantially semispherical body so as to conform to the shape of the substantially semispherical inner surface of the rigid substantially semispherical body and a second of the plurality of driving electrodes being provided on and supported by the substantially semispherical outer surface of the rigid substantially semispherical body so as to conform to the shape of the substantially semispherical outer surface of the rigid substantially semispherical body; and a base section for supporting said vibrating section; wherein said vibrating section and said base section comprise a single unitary molded sintered piezoelectric ceramic body.