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
Control device of hybrid vehicle
Carbon nanotube fiber spun from wetted ribbon
Wind farm, wind power plant in a wind farm and operating control for this purpose
Method for releasing a locking in mobile terminal and mobile terminal using the same
Method for increasing expression of active tumor necrosis factor receptor family member-Ig fusion proteins
Regenerative power storage system mounted on DC electric railway car
Electronic device and printed circuit board
  Randomly Featured Patents
Oil mist sensor
Systems and methods for controlling tissue ablation using multiple temperature sensing elements
Apparatus for converting an RGB signal into a composite video signal and its use in providing computer generated video overlays
Beta-crystalline form of ivabradine hydrochloride, a process for its preparation and pharmaceutical compositions containing it
Soft close ring binder mechanism with mating ring tips
Refrigerants suction guide structure for reciprocating compressor
Solar cell
User interface of a front control panel
Apparatus and method for environmental surveying for contaminants in alluvial materials and bedrock formations
Foot switch for a computer