Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Container pack
Patterned MR device with controlled shape anisotropy
Context-sensitive views
Self-service channel marketplace
Wine bottle
System for determining movement properties of a guided vehicle
Water bottle warning triangle
  Randomly Featured Patents
Method for manufacturing silicon-on-insulator wafer
Data communication apparatus
Basic salts of n-[n-(3,3-dimethylbutyl)-l-.alpha.-aspartyl]-l-phenylalanine 1-methyl ester
Symbol reader using differentiating circuit for light beam focusing
Actively stabilized time multiplexer
Regions of interest in video frames
Water retaining golf towel
Run length limiting apparatus and run length limiting method
Methods of combinatorial processing for screening multiple samples on a semiconductor substrate
Processing extruded thermoplastic polymer