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
System and method to assess serviceability of device
Clostridium chauvoei polypeptide, DNA encoding the polypeptide and a vaccine comprising the polypeptide
Portable, single member housing cord protector
LED lighting module
Radio frequency splitter
Method and device for extracting vapors in an injection molding machine
Focus adjustment unit and optical scanning microscope
  Randomly Featured Patents
Blasting composition
Golf swing timing process
Autofeed speed rivet tool
Intake manifold
Method of fabricating electron source and image forming apparatus
Method and apparatus for detecting the engagement of a proper number of articles
Drills for piles and soil stabilization, and drilling method
Reversible latching hinge
Wine aerator
Multi-spectral image compression and transformation