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
System and method for determining payroll related insurance premiums
Automated solar collector installation design including ability to define heterogeneous design preferences
Identifying conceptually related terms in search query results
Hypallergenic mosaic antigens and methods of making same
Orthogonal tunable antenna array for wireless communication devices
Servo write assembly
  Randomly Featured Patents
Expandable stent and method for delivery of same
Exhaust system for a two-cycle engine
Front bumper for automobile
Communication system
Control system for automatic change speed transmission
Cast light metal component for internal combustion engines
Testing layout services for supporting complex text languages
Submount for light emitting/receiving device
Source follower circuit or bootstrap circuit, driver circuit comprising such circuit, and display device comprising such driver circuit
Heat radiation fin of heat insulating cylinder for manufacturing semiconductor wafers