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
Solid-state imaging device and imaging apparatus
Electronic device including predicted frequency error estimation of a voltage controlled oscillator and related methods
Battery pack with interchangeable circuit substrates
Disk drive to enable defect margining
Storage apparatus and storage apparatus management method performing data I/O processing using a plurality of microprocessors
Optical switching device and communications system
Microcapsules, their use and processes for their manufacture
  Randomly Featured Patents
Seat base
Apparatus for high-rise escape slow descending tube
Wheel design
Test system, test contactor, and test method for electronic modules
Demountable tomato plant support
Glass substrate for a magnetic disc and process for its production
Aqueous cleaning solutions containing elevated levels of N-alkyl-2-pyrrolidone
System, method and article of manufacture for utilizing a wireless link in an interface roaming network framework
Efficient generation of sensing signals in an implantable medical device such as a pacemaker or ICD
Facilitating interaction between web browsers