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Acoustic transducer with liquid-immersed, pre-stressed piezoelectric actuator in acoustic impedance matched transducer housing

  • US 6,075,310 A
  • Filed: 04/17/1998
  • Issued: 06/13/2000
  • Est. Priority Date: 04/17/1998
  • Status: Expired due to Fees
First Claim
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1. An acoustic transducer, comprising:

  • a transducer housing surrounding a transducer housing interior;

    said transducer housing comprising a top portion and a bottom portion removably attached to said top portion;

    said bottom portion having a thickness measurable between an interior surface and an exterior surface;

    said exterior surface being adapted to engage a work medium;

    said interior surface having a first acoustic impedance;

    said exterior surface having a second acoustic impedance;

    said top portion having a third acoustic impedance different from said first acoustic impedance;

    a liquid disposed within said transducer housing interior;

    wherein said liquid has an acoustic impedance;

    a value of said acoustic impedance of said liquid substantially matching said first acoustic impedance of said interior surface;

    a piezoelectric member immersed in said liquid; and

    , energizing means for electrically energizing said piezoelectric member;

    said energizing means comprising means for applying an alternating voltage to said piezoelectric member at a first frequency.

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