Resources Contact Us Home
Ultrasonic speech translator and communications system

Image Number 5 for United States Patent #5539705.

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).

  Recently Added Patents
Polymer-encapsulated colorant nanoparticles
Electric power supply system and electric power supply system for motor vehicle
Extract of Vanilla planifolia
Image generation based on a plurality of overlapped swathes
Method of fabricating CIGS by selenization at high temperature
Semiconductor devices having through electrodes and methods of fabricating the same
Information-provision control method, information reproduction system, information-provision apparatus, information reproduction apparatus and information-presentation control program
  Randomly Featured Patents
Method of semiconductor thin film crystallization and semiconductor device fabrication
Error correction apparatus
Screen blockage measurement and flow performance optimization system
Ground anchor
Method for fabricating an SOI wafer for low-impedance high-voltage semiconductor components
Hydraulic drive system for a vehicle
Fishing spoon
Method and means for the determination of a planar dimension
Tidal electricity generating apparatus