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Ultrasonic speech translator and communications system

  • US 5,539,705 A
  • Filed: 10/27/1994
  • Issued: 07/23/1996
  • Est. Priority Date: 10/27/1994
  • Status: Expired due to Fees
First Claim
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1. A wireless communication system for transmitting and receiving audio signals via ultrasonic acoustical pressure waves comprising an ultrasonic transmitting device and an ultrasonic receiving device;

  • wherein the ultrasonic transmitting device further comprises;

    a source for producing audio signals;

    a voltage controlled oscillator for receiving the audio signal, producing a carrier signal in the ultrasonic frequency range, frequency modulating the carrier signal with the audio signals, and producing a frequency modulated carrier signal;

    a transmitting converter for receiving a frequency modulated carrier signal and transforming the frequency modulated carrier signal to produce a frequency modulated acoustic pressure wave signal; and

    wherein the ultrasonic receiving device further comprises;

    a receiving converter for receiving frequency modulated acoustic pressure wave signals and transforming the frequency modulated acoustic pressure wave signals to produce a frequency modulated electronic carrier signal;

    a demodulator for receiving a frequency modulated electronic carrier signal, demodulating the modulating audio signal from the ultrasonic carrier signal, and producing a demodulated audio signal; and

    an output device for receiving the demodulated audio signal.

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