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System for automatic fitting using real ear measurement

  • US 9,107,015 B2
  • Filed: 03/24/2010
  • Issued: 08/11/2015
  • Est. Priority Date: 03/27/2009
  • Status: Active Grant
First Claim
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1. A hearing assistance device for a wearer having an ear and an ear canal, the wearer having a plurality of target gains determined for the ear, comprising:

  • a housing;

    a hearing assistance device microphone within the housing adapted to sample sound from the wearer'"'"'s ear canal using a probe tube, the hearing assistance device microphone situated in an opening of the ear canal and configured to be used as both a device microphone and a real-ear measurement microphone;

    a receiver adapted to play a sound stimulus to the wearer'"'"'s ear canal; and

    hearing assistance electronics within the housing in communication with the hearing assistance device microphone and the receiver, the hearing assistance electronics programmed to process signals received by the hearing assistance device microphone to automatically self-correct frequency dependent gain of signals played by the receiver in the wearer'"'"'s ear canal using real-ear measurements by the hearing assistance device microphone to approximate the plurality of target gains for each of a plurality of frequency ranges by iterating until an overall target matching error for the plurality of frequency ranges is less than a programmable threshold by adjusting gain in each frequency range by an amount proportional to the target matching error for the frequency range, wherein the hearing assistance electronics use an attenuation factor of the probe tube to process the signals.

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