Resources Contact Us Home
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
Method and an apparatus for processing an audio signal
Adaptive input interface
Chemically bonded carbon nanotube-polymer hybrid and nanocomposite thereof
Method and device for generating low-jitter clock
Charged particle beam apparatus
Managing a packet service call within mobile communications user equipment
Image forming device
  Randomly Featured Patents
Method and apparatus for precooling water supplied to an evaporative cooler with a subterranean heat exchanger
Hanger with irremovable information tab
Wind powered generator apparatus
Range hood device
Self-leveling platform for loading docks
Bipolar method and structure having improved BVCEO/RCS trade-off made with depletable collector columns
System and method for browsing tabbed-heterogeneous windows
Method and apparatus for dynamic MIDI synthesizer filter control
Method of freezing cooked eggs
Modular can coating apparatus