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
Method and system and policy server for guaranteeing data not to be interrupted
Method and system for the geolocation of a radio beacon in a search and rescue system
Helmet mandible
Method for programming non-volatile memory device and apparatuses performing the method
Switching apparatus and controlling method thereof
Topology discovery, control channel establishment, and datapath provisioning within an aggregation network with centralized control
  Randomly Featured Patents
Hepatoselective pharmaceutical actives
Pourer for simultaneously pouring liquid from a container and mixing air into the liquid
Switch joystick
Using spatial properties of MIMO channels for enhanced channel estimation in MIMO systems
Vehicle control by pitch modulation
Semiconductor package
Flexible pipe for great depths
Apparatus and method for processing pipelined data
Ultrasonic vibrator and drive control method thereof
Solid phase assay with visual readout