Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Double piston acoustic transducer with selectable directivity










Image Number 2 for United States Patent #4996674.

A direction selective transducer which includes a center mass fixed between two active transducer element stacks and two head masses. The center mass couples the two stacks and allows the ratio of radiation produced by each head mass to be selected as desired by varying the amplitude and phase of drive voltages applied to the stacks. The transducer can also be used as a directional receiver.








 
 
  Recently Added Patents
Mass spectrometry method
Managing breakpoints in a multi-threaded environment
Container
Portable reading device with mode processing
Voltage detection apparatus and combination circuit
Electrowetting display devices with a reflective plate structure
Automotive lighting system
  Randomly Featured Patents
Catalyst containing at least two dealuminated Y zeolites and a conventional hydroconversion process for petroleum cuts using this catalyst
Non-linear positive dispersion optical fiber
Method and apparatus for testing of core-cell based integrated circuits
Personal interface device for positioning of a microscope stage
Method of unlocking password lock of storage device, information processor, computer-readable recording medium storing unlocking program, and control device
Bubble column reactor with dispersing devices
Method and apparatus for correcting a retained image artifact
Air-ground logic system and method for rotary wing aircraft
Optical convolution velocimeter
Compound tool drive