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
Hierarchical binding and lookup of addresses in inter-process communications systems
Methods and compositions for inhibition of neutrophil exocytosis
Color stable manganese-doped phosphors
Preparation process of transition metal boride and uses thereof
Connector interface for a cable
Transferases and oxidoreductases, nucleic acids encoding them and methods for making and using them
Method to trace video content processed by a decoder
  Randomly Featured Patents
Magnetic recording medium
Opening/closing mechanism for vacuum processing apparatus and vacuum processing apparatus using the same
Therapeutic lumbosacral appliance
Game chair
Energy dispersive X-ray I-FET SDD detector appliance and a method for pulsed reset neutralization of accumulated charges within an energy dispersive X-ray I-FET SDD detector appliance
Process for the hardening under ionizing radiation of a bis-maleimide resin and a composite material using said resin
Urea-isocyanurate copolymers
Riflescope mount assembly
Variants of beta-glucosidases
Mass transport for ternary reaction optimization in a proton exchange membrane fuel cell assembly and stack assembly