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Method and apparatus for treating bronchial asthma

  • US 4,063,550 A
  • Filed: 05/28/1976
  • Issued: 12/20/1977
  • Est. Priority Date: 05/28/1976
  • Status: Expired due to Term
First Claim
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1. An apparatus for use in teaching an asthmatic patient to control his or her breathing so as to minimize the sound produced by the patient breathing which comprises:

  • microphone means for receiving sound, said microphone means being adapted to be located adjacent to the trachea of a patient,means for providing a variable frequency response in accordance with an amplitude of the signal from said microphone means,said means for providing a variable frequency response including means for providing a DC voltage which follows the peak value of a signal from said microphone means, said means for providing a DC voltage being connected to said microphone means,means for varying the frequency of a signal produced by said means for providing a frequency response,speaker means for providing an audible response corresponding to a variable frequency response,voltage controlled oscillator means being connected to said means for providing a DC voltage and to said speaker means, andswitch means permitting said speaker means to be connected to either said microphone means or to said voltage-controlled oscillator means.

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