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
Gemstone setting
Bootstrapping kerberos from EAP (BKE)
Basket option hedging method
Radiator grill for a vehicle
Resource sharing system and method thereof
Cable connector
Method and apparatus for processing credit card transactions
  Randomly Featured Patents
Paint brush wiping device
Caliper gauge
Dimpled connector
Ultrasonic doppler measuring apparatus and control method therefor
Directing process for use in sending trick-mode video streams with a high performance
Control circuit for a switched-mode power supply, particularly for a television receiver
Composition of a high sensitivity sensor for detecting mechanical quantity
Paper supplying machine body for electronic copying machine
Memory device
Deflection yoke