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
Plants and seeds of corn variety CV577261
System and method for discontinuous reception control start time
Modified polyolefin resin for glass fiber treatment, surface-treated glass fiber, and fiber-reinforced polyolefin resin
Display screen with graphical user interface
Rotating sunlight/light beam for fractional/beneficial use
Systems and methods for performing live chat functionality via a mobile device
Fiber optic cables and assemblies for fiber toward the subscriber applications
  Randomly Featured Patents
Single-ended differential circuit using complementary devices
Lathe for making contact lenses
Uninterruptible power supplies
Polyurethane foams and method of manufacture thereof
Polyport atmospheric gas sampler
Apparatus for recording and reproducing information
Multifunctional spring clips and cartridges and applicators therefor
Rotary nozzle on a molten steel vessel
Cooling of head actuator of disk device
Intraocular lens