Resources Contact Us Home
Tapered tube impedance matching underwater voice communicator with bubble silencer

Image Number 2 for United States Patent #4527657.

An underwater voice communicator in which the preferred embodiment comprises a pair of tapered tubes in communication with a diver's mouth. The tubes are constructed of a material having a sound impedance similar to the sound impedance of water. Sound energy issuing from the mouth of a diver is reflected down the length of the tapered tubes to an area of the tube that concentrates the sound for injection into the surrounding water.

  Recently Added Patents
Method and apparatus for supporting HARQ
N-phenyl-(homo)piperazinyl-benzenesulfonyl or benzenesulfonamide compounds suitable for treating disorders that respond to the modulation of the serotonin 5-HT.sub.6 receptor
Method for controlling a motor
Quinoid thiophene organic photoelectric material, preparation method thereof and application thereof
Downhole telemetry system
Antimony and germanium complexes useful for CVD/ALD of metal thin films
Communication system, authentication device, control server, communication method, and program
  Randomly Featured Patents
Method and apparatus for supporting printed board
Communicating packets in a wireless multi-user multi-hop relay networks
Stabilizer compounds and process for their preparation
Web registration control
Digital circuit for decoding encoded doppler data
Drying poncho
Tongue cleaner
Process for the calibration of a flow sensor in a respiratory system
System, method, and computer program product for applying different transport mechanisms for user interface and image portions of a remotely rendered image
Preparation of imidazole-4,5-dicarboxylic acid