Resources Contact Us Home
Acoustic structure and acoustic room

Image Number 15 for United States Patent #8006802.

In a hollow member, a portion of a hollow region adjoining and communicating with an opening portion is constructed as an intermediate layer. The intermediate layer is constructed in such a manner that, when a reflective surface radiates reflected waves corresponding to incident sound waves falling from an external space on the opening portion and the reflective surface of the hollow member, a phase, in the opening portion, of reflected waves produced by resonance of the resonator in response to the incident waves differs from a phase of reflected waves on the reflective surface, and that the absolute value of a value obtained by dividing a specific acoustic impedance of the opening portion by a characteristic impedance of a medium of the opening portion is less than one. A sound absorbing effect through resonance-based action in the opening portion and a sound scattering effect through a flow of gas molecules.

  Recently Added Patents
Detecting patterns of abuse in a virtual environment
Vehicle speed verification system and method
Social community generated answer system with collaboration constraints
Data management tool
Dose escalation enzyme replacement therapy for treating acid sphingomyelinase deficiency
Encoding and/or decoding memory devices and methods thereof
Stabilized redispersible polymer powder compositions
  Randomly Featured Patents
Analog phase frequency detecting apparatus and method
System for intelligent consumer earcons
Smart laser diode array assembly
Combined wine bottles holder and chiller
Electronic apparatus and electronic system with expanding apparatus having interlock, ejector, grounding, and lock mechanisms, for expanding function of electronic apparatus
Method and system for channelization and down conversion of wideband subscriber information signals
Picture frame
Portable jogging tricycle
Method for producing a transgenic pig using a hyper-methylated transposon
Coffee pot press handle