Resources Contact Us Home
Sound absorbing structure and vehicle component having sound absorbing property

Image Number 16 for United States Patent #8011472.

A sound absorbing structure is constituted of a housing having a hollow portion and an opening and a vibration member composed of a board or diaphragm. The vibration member is a square-shaped material having elasticity composed of a synthetic resin and is bonded to the opening of the housing, thus forming an air layer closed inside the sound absorbing structure by the housing and the vibration member. In the sound absorbing structure, when the lateral/longitudinal dimensions of the air layer and characteristics of the vibration member (e.g. a Young's modulus, thickness, and Poisson's ratio) are set such that the fundamental frequency of a vibration occurring in a bending system falls within 5% and 65% of the resonance frequency of a spring-mass system, a vibration mode having a large amplitude occurs in a frequency band lower than the resonance frequency of the spring-mass system, this improving the sound absorption coefficient.

  Recently Added Patents
High gradient lens for charged particle beam
Method of and apparatus for image denoising
Projection-type video-image display apparatus
Method for manufacturing photoelectric conversion device
Area reduction for surface mount package chips
Magnifying glass
Method and apparatus for managing communication services for user endpoint devices
  Randomly Featured Patents
Field-effect transistor
System and method of improving task switching and page translation performance utilizing a multilevel translation lookaside buffer
Hand operated animal call
Dynamic power management for I/O resource pools
Aiding device, and non-transitory computer-readable recording medium in which design aiding program is stored
Percussion mallet for musical instruments
Method of activating catalyst for carbon monoxide removal
Solid state device
Mounting of the coupling body of a trailer coupling in the cross-piece
Clamp for screwed fastening member