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
Information processing using batch setting information
Meter socket cabinet
Method of making a CIG target by cold spraying
Device for producing a connection grid with an integrated fuse
Electronic badge
Pharmaceutical treatment process using chitosan or derivative thereof
Water slide
  Randomly Featured Patents
Control device for electric rotating machine in hybrid-type power transmission
Polymer electrolyte comprising inorganic conductive nano-particles and fuel cell employing the polymer electrolyte
Sewing thread organizer
Activity toy or the like
Sterilization system
Collapsible deer blind
Low cost squib driver for airbag application
Apparatus and method for electrically butt welding of skelp edge faces which have been preheated
System and method for monitoring support activity
Lubricating oil composition