| 摘要 |
The present invention relates to a soundproof panel structure using a composite sound absorbing material in a soundproof panel constituting a soundproof wall, in the soundproof wall installed on the periphery of a road, a school and a factory where noise is generated. Especially, the present invention provides a soundproof panel to improve sound absorbing performance at a middle and high frequency band. According to the present invention, a PP+PE composite sound absorbing material is closely attached to the inner front surface of a circular boring type front board of the soundproof panel, wherein the PP+PE composite sound absorbing material is formed by thermal bonding of an external protective material which is formed by compression of polypropylene and polyethylene in the ratio of 50 to 50 on the front surface and the rear surface of an internal sound absorbing material formed kinkily like wool by a conventional fiber web processing method. |
