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
Level shifter and method of using the same
RFID device using single antenna for multiple resonant frequency ranges
Incrementally increasing deployment of gateways
AC/DC converter
Rule-based stimulation program search
Data security for dynamic random access memory using body bias to clear data at power-up
Call admission control method and system
  Randomly Featured Patents
Vapor recovery fuel dispensing nozzle
Method and system for global flow field management using distributed, surface-embedded, nano-scale boundary layer actuation
Method and system for secure digital triggering for an oscilloscope
Versatile network operations center and network for transaction processing
Tire tread
Method and apparatus for displaying broadcast signals and station information
Catalytic reforming of gasoline feedstocks
Ram driving device and press machine using same
Drain valve
Thin polysilicon resistors