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Self-powered medical device

  • US 6,516,073 B1
  • Filed: 09/05/2000
  • Issued: 02/04/2003
  • Est. Priority Date: 09/02/1999
  • Status: Expired due to Fees
First Claim
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1. A self-powered hearing aid, operable independently of a power supply network, comprising:

  • a housing containing at least one voltage source;

    an acousto-electric transducer which receives an incoming audio signal and generates an analog input signal therefrom;

    an analog-to-digital converter for converting said analog input signal into a digital input signal, including sampling said analog input signal at a sampling rate;

    a digital signal processing unit for digitally processing said digital input signal to correct a hearing impairment by executing a hearing program including at least one signal processing procedure having a clock frequency associated therewith, to produce a digital output signal;

    a digital-to-analog converter for converting said digital output signal into an analog output signal, said digital-to-analog converter operating at said sampling rate;

    a signal analysis and evaluation unit for analyzing said digital input signal and for altering at least one of said sampling rate and said clock frequency dependent on said digital input signal to temporarily reduce at least one of said sampling rate and said clock frequency; and

    an electroacoustical transducer supplied with said analog output signal for generating an audio output signal therefrom.

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