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
Cable preparation tool
Mode detection for DVB receiver
Instantaneous single click perpetual date mechanism
Latch-up free ESD protection
Indexing, relating and managing information about entities
Medicament container
Maltol ether processes and intermediates
  Randomly Featured Patents
Lithium dicyclopentadienyl titanium hydride compositions
Spiro-hydantoin compounds useful as anti-inflammatory agents
Shielded housing
Processes for separation of fluoroolefins from hydrogen fluoride by azeotropic distillation
Method of making films and coatings having anisotropic conductive pathways therein
Memory with shielding effect
Security enhancement for untrusted executable code
Method for detecting oil in water
Intake apparatus for an engine
Storm panel track