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
Image forming apparatus
Method and device for processing broadcast packets/multicast control messages
Press nut
Basket for a dishwasher
Automatic adjustment of devices in a home entertainment system
Method for implementing dynamic pseudorandom keyboard remapping
Use of natriuretic peptide for treating heart failure
  Randomly Featured Patents
Optical recording medium with different wobble characteristics between the user data area and the lead-out area
Dinitrosyldihalo complexes of molybdenum or tungsten
Wavelet transform of super-resolutions based on radar and infrared sensor fusion
Corner coupling for a chair frame
Shaft reactor for treating bulk material
Creating taxonomies and training data for document categorization
Fabric bleaching composition
Electrical connectors
Site based media storage in a wireless communication network
Portable adjustable stand for satellite dish antennas