Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Transfer formulas
Sensor chip, sensor cartridge, and analysis apparatus
Method for producing cathode active material for a lithium secondary battery
Active matrix substrate, method for manufacturing same, and liquid crystal display apparatus
Device for maneuvering a vehicle using maneuvering moves using at least one trajectory
Discharge circuit and method
Method for cutting C--Mn steel with a fiber laser
  Randomly Featured Patents
Optical head device and optical information reproducing device
Orthopedic device
Method and apparatus for duct sealing using a clog-resistant insertable injector
Microphone
Paving stone
Interlinked synthetic garbage incinerator with a plurality of inlets
Bidirectional optical transmission device
Graphite packing
Paint ball magazine apparatus
Method and apparatus for maintaining a bow