Resources Contact Us Home
Sound absorbing body, sound absorbing structural body, and method of manufacturing these bodies

Image Number 4 for United States Patent #7364014.

A sound absorbing body 40 has a molded body 44 including two unexpanded layers 41, 42 and an expanded layer 43 having a number of voids and held between these unexpanded layers 41, 42, a plurality of holes 41A of a depth that passes through the unexpanded layer 41 and does not reach the other unexpanded layer 42 are formed at any positions on the molded body 44, a cross-sectional area of the hole 41A is in the range from 0.785 to 314 mm.sup.2, and the pitch is 1 mm or larger. Laminating a plurality of materials is not required, and both the sound absorbing capability and sound insulating capability can be secured by integral molding, and further, only unpleasant sounds can selectively be absorbed.

  Recently Added Patents
Indexing, relating and managing information about entities
Method and apparatus for detecting and tracking vehicles
Housing for gas flow indicator
Package for product
Transmitting a synchronizing signal in a packet network
Power converter and method including noise suppression by controlling phase shifting of converter cells
Vehicle grille
  Randomly Featured Patents
Pressure sensor
Working with two different object types within the generic search tool
Amplifier circuit
Color image-forming method and transfer sheet used for the method
Method for efficiently generating selectable antenna polarization
Device for filling viscous material
Shirt having form-fitting mid-section support
Heat shield for sealing a flow channel of a turbine engine
Electrically short air line for network analyzer calibration
Method and apparatus for displaying a customized advertising message with a retail terminal