Resources Contact Us Home
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 apparatus for increasing query traffic to a web site
Method of predicting a motion vector for a current block in a current picture
Methods and systems for sending messages regarding an emergency that occurred at a facility
Pre-sealing unit for wire-cut electric discharge machine
System and method of improving audio signals for the hearing impaired
Method for encoding signal, and method for decoding signal
Performance monitoring of advanced process control systems
  Randomly Featured Patents
System for using a multi-phase motor with a double-ended inverter system
Method and apparatus for computer integral with wall
Polymer electrolyte membrane with an inorganic backbone
Igniter pellet cup
Sound generating book
Power drill support and guide apparatus
Overcurrent display device
Maintaining activity after contact liftoff or touchdown
Electrochemical test strip having a plurality of reaction chambers and methods for using the same
Garment tracking and processing system