Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Frequency selective acoustic waveguide damping










Image Number 2 for United States Patent #6278789.

An acoustic waveguide loudspeaker system has an electroacoustical transducer having a vibratile surface. An acoustic waveguide has a first end open and a second end adjacent to the vibratile surface and an effective length corresponding substantially to a quarter wavelength at the lowest frequency of pressure wave energy to be transmitted between the first and second ends. Damping material in the waveguide near the vibratile surface is positioned so as to negligibly attenuate bass frequency energy while of sufficient volume to damp peaks at higher frequencies above the range of the bass frequency energy.








 
 
  Recently Added Patents
Keypad assembly for electronic devices
Biaxially oriented hydrolysis-stable polyester film comprising epoxidized fatty acid derivatives and a chain extender, and process for production thereof and use thereof
Channel marking for chip mark overflow and calibration errors
Methods and systems for automated segmentation of dense cell populations
Method and apparatus for belling plastic pipe
Battery pack with interchangeable circuit substrates
Information terminal, setting information distribution server, right information distribution server, network connection setting program and method
  Randomly Featured Patents
Fixing device of image forming apparatus
Magnetic brush developing apparatus
Dye-receiving element subbing layer for use in thermal dye transfer
Combined writing instrument and amusement device
Machine translation apparatus for translating document with tag
Diamond abrasive saw blade
Optical waveguide devices with deuterated amorphous carbon core structures
Golf putter head
Method for manufacture of composite fiber
Methods of fabricating profiled device isolation trenches in integrated circuits