Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Electrostatic ultrasonic transducer and ultrasonic speaker










Image Number 17 for United States Patent #8126171.

An electrostatic ultrasonic transducer includes a first electrode that has through-holes, a second electrode that has through-holes, and a vibrating membrane that is disposed such that the through-holes of the first electrode and the through-holes of the second electrode form a pair, interposed between a pair of electrodes composed of the first electrode and the second electrode, and having a conductive layer applied with a direct current bias voltage. The first electrode and the second electrode each have counter electrode portions that are formed in the through-holes to face the vibrating membrane, and a modulated wave, which is obtained by modulating a carrier wave in an ultrasonic frequency band with a signal wave in an audible frequency band, is applied between the pair of electrodes.








 
 
  Recently Added Patents
Method and system for fail-safe call survival
Information processing apparatus and storage medium for storing information processing program
Pixel circuit
Pre-sealing unit for wire-cut electric discharge machine
Multiple RF band operation in mobile devices
Portable stand
Test framework of visual components in a multitenant database environment
  Randomly Featured Patents
Cell-specific contrast agent and gene delivery vehicles
Charitable contribution system
Low stress liquid cooled generator armature winding
Holding apparatus, holding method, exposure apparatus and device manufacturing method
Refrigeration lubricating oil containing dialkyl sulfosuccinate
Portable self contained light generating device powered by a flow of falling granular material
Linked dimension and measure groups
Programmable calculator having keys for performing angular measurement unit conversion
Turn signal apparatus
Planarization of metal films for multilevel interconnects