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
Advanced joint detection in a TD-SCDMA system
Sensor system
Wearable display device
Burner grate
Semiconductor device having trapezoidal shaped trenches
Categorization of design rule errors
  Randomly Featured Patents
Imaging system with quality audit capability
Use of certain materials as thinners in oil-based drilling fluids
Thorium tetrabromide scintillators and radiation detection and measurement therewith
Hybrid tea rose plant named `KOR981457`
Voltage multiplier circuit
System for bidirectional data transmission between a beacon and a vehicle
Rare earth permanent magnet and its preparation
Headlamp adjuster mechanism
Pressure sensor including a resistor commutator for providing unambiguous atmospheric pressure data
Multi-sided novelty piece and method for making the same