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
Methods and systems for presenting an inhalation experience
Polyolefin and composition for pipe systems and sheets
Traveling wave amplifier with pre-emphasis function
Image processing apparatus and method
Case assembly for portable device
Tris-quaternary ammonium salts and methods for modulating neuronal nicotinic acetylcholine receptors
Information processing apparatus, installer program, and recording medium
  Randomly Featured Patents
Apparatus for fabricating preformed objects from lignocellulose matted fiber fabrics
Multi-phase clock generator and data transmission lines
Winding tape and method of making winding tape
Homopolar transformer for conversion of electrical energy
Life saving garment
Powder ejector
Method for designing a noise shaper with a single loop distributed feedback delta-sigma modulator
Hot removal process for asbestos insulation
Method of controlling communication network incorporating virtual channels exchange nodes and virtual paths exchange nodes