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

Image Number 7 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
Method of preparing MgB.sub.2 superconducting wire and the MgB.sub.2 superconducting wire prepared thereby
Mobile communication terminal provided with handsfree function and controlling method thereof
Method and apparatus for supporting HARQ
Method for forming contact hole
Apparatus and method for extracting cascading style sheet rules
Dynamic web page construction based on determination of client device location
Semiconductor device having a triple gate transistor and method for manufacturing the same
  Randomly Featured Patents
Printing ribbon for printing red scannable bar codes
Authentication of a server by a client to prevent fraudulent user interfaces
Field sequential ferroelectric LCD having a single crystalline layer in which a plurality of circuit elements are formed
Symmetrical path vertical tillage system and method
Power tool having pneumatic vibration dampening
Variable frequency divider
Clothes dryer
Methods and apparatus for dynamic transfer of image data
Case for presenting and using cosmetic powders
Bolt holding wrench