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Binaural hearing aid

  • US 5,479,522 A
  • Filed: 09/17/1993
  • Issued: 12/26/1995
  • Est. Priority Date: 09/17/1993
  • Status: Expired due to Term
First Claim
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1. In a binaural hearing enhancement system having a right ear piece with microphone and speaker, a left ear piece with microphone and speaker and a body pack for remote electronics in the system, apparatus for enhancing left and right audio signals comprising:

  • transceiver means in each ear piece for transmitting right and left input audio signals to the body pack and for receiving right and left output audio signals from the body pack;

    stereo transceiver means in the body pack for receiving the right and left input audio signals from the right and left ear pieces and for transmitting right and left output audio signals from the body pack;

    left filter means in the body pack for filtering the left input audio signals to compensate for amplitude and phase distortion introduced in audio signals by a left ear microphone or a pre-emphasis filter in the left ear piece;

    right filter means in the body pack for filtering the right input audio signals to compensate for amplitude and phase distortion introduced in audio signals by a right ear microphone or a pre-emphasis filter in the right ear piece; and

    each of left and right filter means generating a flat, linear-phase, frequency response for the left and right input audio signals in order to deliver undistorted amplitude and phase-aligned left and right signals as left and right distortion-free signals to enhancing means whereby the left and right distortion-free signals accurately reflect interaural amplitude differences and delay differences at the ears;

    means for enhancing each of the left and right distortion-free signals based on audio information derived from both the left and right distortion-free signals to produce enhanced left and right output audio signals for transmission to the ear pieces.

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