Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Martin L. Lenhardt0
Date of Patent
January 31, 2012
0Patent Application Number
119689490
Date Filed
January 3, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A ring transducer comprising an outer metal ring and an inner ceramic ring provides a device for the conduction of ultrasonic signals directly in the ear canal, thereby providing an efficient means for the conduction of such signals. In an alternate embodiment, stacks of piezoelectric film, optionally shaped into a ring, may be used for placement in the ear or outside the ear, such as on the ends of eyeglasses.
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