Parametric transducer and related methods
AssigneeParametric Sound Corporation
InventorELWOOD G. NORRIS
Life of this patent
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Abstract
An ultrasonic audio speaker includes a backing plate comprising a first major surface and a conductive region, the backing plate further comprising a plurality of textural elements disposed on the first major surface. A flexible layer disposed adjacent the first major surface of the backing plate includes a conductive region and an insulative region, wherein the flexible layer is disposed adjacent the backing plate such that the insulative region is positioned between the backing plate and the conductive region of the flexible layer, and such that there is a volume of air between the flexible layer and surfaces of the textural elements.
Claims18
An ultrasonic audio speaker, comprising:
- a backing plate comprising a first major surface and a conductive region, the backing plate further comprising a plurality of textural elements disposed on the first major surface;
- a flexible layer disposed adjacent the first major surface of the backing plate, the flexible layer comprising a conductive region and an insulative region, wherein the flexible layer is disposed adjacent the backing plate such that the insulative region is positioned between the backing plate and the conductive region of the flexible layer, and such that there is a volume of air between the flexible layer and surfaces of the textural elements;
- wherein the backing plate and the flexible layer are each configured to be electrically coupled to a respective one of a pair of signal lines carrying an audio modulated ultrasonic carrier, and further wherein, upon application of the audio modulated ultrasonic carrier the flexible layer is configured to launch a pressure-wave representation of the audio modulated ultrasonic carrier signal into the air.
An electrostatic emitter, comprising:
- a first pole comprising a conductive element having a textured surface;
- a second pole comprising a metallized film disposed adjacent the textured surface of the first pole;
- wherein, upon application of an audio-modulated ultrasonic carrier the second pole is configured to resonate in response to an audio-modulated signal and to launch a pressure-wave representation of the audio modulated ultrasonic carrier signal into the air.
An ultrasonic audio speaker, comprising:
- a first layer having a first major surface, a second major surface and a conductive region;
- a second layer disposed adjacent the first layer and having a first major surface, a second major surface and a conductive region;
- and
- an insulating region disposed between the first and second regions;
- wherein the second layer comprises a backing plate and the backing plate comprises a plurality of textural elements.
Dependencies are inferred from the claim text.