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US 6,438,242 B1Granted
Acoustic transducer panel
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorThomas R. Howarth
Life of this patent
Estimating the term…
Abstract
An electro-acoustic transducer in which a plurality of cymbal-type electro-acoustic actuators are disposed in mechanical and electrical parallel between a pair of stiff plates. The resultant transducer resonates at a lower frequency than the cymbals, with a greater generated force.
Claims6
An electro-acoustic transducer for transducing acoustic signals at or below a pre-selected acoustic frequency, comprising:
- a plurality of cymbal-shaped acoustic elements;
- and
- a pair of plates;
- wherein each of said plurality of cymbal-shaped acoustic elements is disposed in mechanical parallel arrangements between said pair of plates, and each of said elements is further disposed in electric parallel arrangements with respect to one another;
- and
- wherein the size of each of said pair of plates and the number of said elements is selected to be driven in piston mode by said plurality of cymbal-shaped acoustic elements at or below said pre-selected frequency.
3 more elements
An electro-acoustic transducer capable of being driven in a piston mode comprising:
- a plurality of cymbal-shaped acoustic elements;
- and
- a pair of plates;
- wherein each of said plurality of cymbal-shaped acoustic elements is disposed in a mechanical parallel arrangement between said pair of plates, and each of said cymbal-shaped elements is further disposed in electric parallel arrangement with respect to one another,
- whereby when said electro-acoustic transducer is driven in a piston mode said plates experience an up and down motion in a linear fashion, resulting in a near field velocity that is substantially linear.
2 more elements
Dependencies are inferred from the claim text.