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
Knee guard
Frequency offset estimation apparatus and method of OFDM system
Solar power system with communication network utilizing magnetic fields
Die seal ring
Dye sensitised solar cell
Method and system for dynamically representing distributed information
Ignition device in particular for an internal combustion engine, and method for manufacturing same
  Randomly Featured Patents
Apparatus for manufacturing a dried web of paper
Process for the preparation of uranium dioxide
Peptoid compounds
Safety seat for a child
Method and system for data conversion
Intra-premises content and equipment management in a femtocell network
Method and apparatus for subsequent underground sealing
Microscopy imaging apparatus and method
Improved friction lock
Oil pump and method of assembling the oil pump