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
Structure of pixel electrode
Methods of packaging imager devices and optics modules, and resulting assemblies
Method and apparatus for connecting to external device
Protection circuit, substrate for electro-optical device, electro-optical device, electrophoretic display device, electronic apparatus, and manufacturing method of electro-optical device
Method of generating integrated circuit model
Ascertaining presentation format based on device primary control determination
Duty cycle adjustment of remote illumination source to maintain illumination output
  Randomly Featured Patents
Expandable room with flat floor
Method and instruments for resection of the patella
Data transfer with JTAG controller using index register to specipy one of several control/status registers for access in read and write operations with data register
Data processing circuit
Generating a depth map from a two-dimensional source image for stereoscopic and multiview imaging
Isolated DNA comprising one or more genes specific for 5S clavam biosynthesis, vectors comprising such DNA and streptomyces hosts capable of improved clavulanic acid production
Semiconductor device and manufacturing method thereof
Tool carrier-organizer
Zero insertion force socket terminal
Display device with multilayer body having at least one layer of a gluing agent