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Vibrator for bone conducted hearing aids

  • US 6,985,599 B2
  • Filed: 05/31/2001
  • Issued: 01/10/2006
  • Est. Priority Date: 06/02/2000
  • Status: Expired due to Fees
First Claim
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1. A vibrator for bone conduction type hearing aid devices in which sound information is mechanically transmitted via the skull bone directly to the inner ear of a person with impaired hearing, the vibrator comprising:

  • a two-piece coil operative to generate a dynamic magnetic field;

    an intermediate central wall between the two coil pieces; and

    an annular permanent magnet operative to generate a static magnetic field in a magnetic circuit, the permanent magnet being located on the central wall between the two coil pieces, such that the static magnetic field and dynamic magnetic field cooperate in the magnetic circuit, while the dynamic field does not pass through the permanent magnet, in order to provide the vibrator with an axial force generation.

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