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
Watch dial
(4928
Interest point detection
Kit and method for the capture of tumor cells
Method and apparatus for diagnosing faults in a hybrid internet protocol network
Multi-dimensional credibility scoring
Image browsing device, computer control method and information recording medium
  Randomly Featured Patents
Data encoder/decoder for a high speed serial link
Arrangement and method for signal processing and storing
Retractable screwdriver
Multicapsule intraluminal grafting system and method
Flame retardant aromatic polycarbonate with good mechanical properties and melt stability
Squirting toy with animal head
Method and apparatus for verifying security labels
Automobile
Optimal data storage and access for clustered data in a relational database
Analytical pretreatment device