Ultrasonic speech translator and communications system
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original audio signal. The ultrasonic speech translator and communication system (20) includes an ultrasonic transmitting device (100) and an ultrasonic receiving device (200). The ultrasonic transmitting device (100) accepts as input (115) an audio signal such as human voice input from a microphone (114) or tape deck. The ultrasonic transmitting device (100) frequency modulates an ultrasonic carrier signal with the audio signal producing a frequency modulated ultrasonic carrier signal, which is transmitted via acoustical pressure waves across a carrier medium such as gases, liquids or solids. The ultrasonic receiving device (200) converts the frequency modulated ultrasonic acoustical pressure waves to a frequency modulated electronic signal, demodulates the audio signal from the ultrasonic carrier signal, and conditions the demodulated audio signal to reproduce the original audio signal at its output (250).
117 Citations
32 Claims
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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;
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. 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;
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wherein the ultrasonic transmitting device further comprises; a source for producing audio signals; a pre-amplifier for receiving the audio signals and amplifying the audio signals to produce an amplified audio signal; a frequency modulator for receiving the amplified audio signal, frequency modulating an ultrasonic carrier signal with the amplified audio signal, and producing a frequency modulated carrier signal; a 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 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 signal conditioner for receiving a frequency modulated electronic carrier signal, conditioning the frequency modulated electronic carrier signal for frequency demodulation, and producing a conditioned frequency modulated carrier signal; a phase-locked loop demodulator for receiving a conditioned frequency modulated carrier signal, demodulating the modulating audio signal from the ultrasonic carrier signal, and producing a demodulated audio signal; a filter for receiving a demodulated audio signal, removing unwanted electronic noise and producing a filtered audio signal; an audio amplifier for receiving a filtered audio signal and amplifying the filtered audio signal to produce a final audio signal; and an output device for receiving the final audio signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification