Resources Contact Us Home
Speaker system

Image Number 3 for United States Patent #6834744.

This invention has been made to provide a speaker system capable of miniaturization and presenting a good sound quality. A speaker 15 is mounted on a printed circuit board 21 arranged inside a telephone body enclosure 12. Acoustic waves of positive phase produced by vibration of a diaphragm 23 of the speaker 15 are output through front acoustic apertures 28 and a front air chamber 37 to the exterior from an enclosure acoustic aperture 13. On the other hand, the acoustic waves of opposite phase enter a rear air chamber 35 through rear acoustic apertures 29, reach an enclosure internal space 36 through an opposite-phase opening 34 provided by cutting away a part of a rear sealing member 32, and transmit to a card slot 14, then being output to the exterior. The opposite-phase opening 34 as an opening allows the acoustic waves to be output in a direction remotest from the card slot 14, so that the acoustic waves of opposite phase are output to the extension through the remotest path in the enclosure of the speaker resulting in reducing interference of the acoustic waves of positive phase and negative phase. This enables realization of a speaker system of small size but of a good sound quality.

  Recently Added Patents
Anti-FGFR3 antibodies and methods using same
Flat panel crystal display employing simultaneous charging of main and subsidiary pixel electrodes
Method for detecting motion of an electrical device or apparatus
Author signatures for legal purposes
System and method for performing image correction
Methods, systems, and computer program product for virtually modifying surface region curvature to detect protrusions
Dry-cooling unit with gravity-assisted coolant flow
  Randomly Featured Patents
Pesticide rinser
Magnetostrictive mechanical quantity sensor and method for manufacturing same
Fabric coating composition containing energy absorbing phase change material
Fail-safe mechanism having a driver circuit for controlling driving of an electrical system of a vehicle
Process for conversion of lysine dihydrochloride to lysine monohydrochloride
Information processing device, information processing method and smartcard
Program converting apparatus and program conversion method
Fiberglass fence post or column structure
Racemic prostaglandins of the 2-series and analogs thereof
Method and system for determining total code execution time in a data processor