Resources Contact Us Home
Panel-form loudspeakers

Image Number 4 for United States Patent #6198831.

A panel form loudspeaker/microphone combination has a distributed resonant bending wave member and two transducers mounred on the member at sites where the number of vibrationally active resonance anti-nodes is relatively high. One transducer is capable of vibrating the member to couple to and excite resonant bending wave modes in the member and cause the member to produce an acoustic output. The other transducer also is capable of coupling to he resonant bending wave modes in the member, but it produces an output signal in response to resonance of the member due to incident acoustic energy. The combination may be part of a loudspeaker system including an amplifier for the source signal coupled to the first transducer, and a signal receiver coupled to the second transducer for treating the output signal.

  Recently Added Patents
Organic electroluminescence element
System and method for computational unification of heterogeneous implicit and explicit processing elements
Look up table (LUT) structure supporting exclusive OR (XOR) circuitry configured to allow for generation of a result using quaternary adders
Maize variety inbred PH1CD7
Polymer composites having highly dispersed carbon nanotubes
Image processing device and information storage medium including motion vector information calculation
Device having built-in digital data device and light for insertion into a lamp holder
  Randomly Featured Patents
Picture display device
Smoke retardant vinyl chloride and vinylidene chloride polymer compositions
Use of polyamines as demulsifiers
Connector with a network cable identifier
Lamina stack for a two-pass evaporator
Battery apparatus for controlling plural batteries and control method of plural batteries
Process for preparing wound core having low core loss
Method and apparatus for profile-based code placement using a minimum cut set of the control flow graph
Substituted isoxazoles
Covering device