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
Method and device for accessing the documentation of an aircraft according to alarms generated therein
System and method for enhanced artificial bandwidth expansion
Process for the production of an acylation catalyst
Atmospheric treater with roller confined discharge chamber
Programmable computer mouse
Method for the synthesis of an array of metal nanowire capable of supporting localized plasmon resonances and photonic device comprising said array
Herbicide composition having improved effectiveness, method of preparation and use
  Randomly Featured Patents
Control system and method for an internal combustion engine, obtaining air pressure after bottom dead center
Image forming apparatus capable of electrostatically attracting sheet effectively
Circuits and methods to reduce or eliminate signal-dependent modulation of a reference bias
Rotatable-spool fishing reels
Brake apparatus
Quantum interference transistors and methods of manufacturing and operating the same
Addressing of redundant subscribers in a communication network
Methods of priming explosive devices
DC-to-DC converter providing high current and low voltage
Method for removing contaminants from a semiconductor wafer