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
Vehicle having power supply apparatus
Thin film switch and press key/keyboard using the same
Polymer compositions and nonwoven compositions prepared therefrom
Systems and methods to provide communication history for communication devices
Flood protection apparatus and container data center including the same
Systems, methods, and computer readable media for providing information related to virtual environments to wireless devices
Method and system for dynamically representing distributed information
  Randomly Featured Patents
Parts washing system
Prostate boundary segmentation from 2D and 3D ultrasound images
Simulative tent
Analog-to-digital converter of an annular configuration
Tube loading system
Shoe outsole
Display assembly
Spinning apparatus with retractable suction gun
Process for producing cheese curd
Inner focus type zoom lens system