Resources Contact Us Home
Enclosure for symbiotic active/passive operation of an acoustic driver

Image Number 5 for United States Patent #7624839.

A compact loudspeaker enclosure combines planar type devices for high frequency sound reproduction and cone type active devices for low frequency sound reproduction. The low frequency cone type transducers are mounted in baffles between forward and rear enclosed spaces and thus do not directly radiate into the environment. The first enclosed space is acoustically coupled to the environment by the planar device which is mounted between the first enclosed space and the environment with one major face mounted to radiate either directly into the environment or to be horn loaded. The planar operates as a passive radiator to the LF devices at low frequencies and an active device above a crossover frequency.

  Recently Added Patents
Generating a funding and investment strategy associated with an underfunded pension plan
Method for spore detection
Method and apparatus for filter-less class D audio amplifier EMI reduction
Audio processing in a multi-participant conference
Rupture resistant system
Lighting control device and lighting control method
Device with a floating head having a heater element
  Randomly Featured Patents
Loudspeaker grille
Bipolar electrode
Method for making encapsulated gas microspheres from heat denatured protein in the absence of oxygen gas
Strainer cup for pop-up drain plug
Pattern-clip-based hotspot database system for layout verification
Free wheel hub mechanism
Method and device for optimisation of the management of a server cache which may be consulted by client terminals with differing characteristics
Combined fish poacher, rack and cover
Control system for fluorescent light fixture
Vehicle wheel cleaning device with removable batten