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
Drug delivery system
Coreference resolution in an ambiguity-sensitive natural language processing system
Hybrid CMOS nanowire mesh device and PDSOI device
Implant for performance enhancement of selected transistors in an integrated circuit
System and method for enhanced transaction payment
Method and apparatus for compensating QoS during handover by base station in wireless broadband access system
  Randomly Featured Patents
Magnetic head device including a playback head and a recording head maintaining contact with a film
Article storage organizer
Backrest holder for a chair
Apparatus for adjusting jaw gap of jaw cylinder for folder
Undercut-engaging dowel
Analog digital combination watch
Polymorph V of torasemide
Thermosensitive recording material
Method of preparing a borate organic complex anion containing salt compositions