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Sound generating apparatus, a sound detection apparatus, an acoustic sensor, and an acoustic living body measuring apparatus

  • US 6,275,447 B1
  • Filed: 02/10/1999
  • Issued: 08/14/2001
  • Est. Priority Date: 02/18/1998
  • Status: Expired due to Term
First Claim
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1. A sound generating apparatus comprising:

  • a flexible substrate; and

    a plurality of bimorph cells arranged on a surface of said flexible substrate at a predetermined interval along a predetermined direction, each of said bimorph cells having input/output terminals, wherein said bimorph cells are fixed to said surface of said flexible substrate and thereby, flexibility of said sound generating apparatus at intermediate portions between said bimorph cells is higher than flexibility of said sound generating apparatus at portions of said bimorph cells to bend said flexible substrate in said direction.

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