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
Communication terminal, communication system, server apparatus, and communication connecting method
Electronic devices with voice command and contextual data processing capabilities
Electrode material and use thereof for production of electrochemical cells
Processing autocomplete suggestions
Idle stop and go system and method for controlling thereof
Verifiable service policy implementation for intermediate networking devices
Managing deduplication density
  Randomly Featured Patents
Cryogenic fluid transferring device
Fishing lure
Log analysis method and recording medium storing log analysis program
Pre-mastering for optical media recording
Container-filling machine with level sensing and blowdown
Digital to analog converter
Window component extrusion
Optical Transmission circuit
Identifying defective data sectors in a disk drive
Hydraulic safety circuit