| 摘要 |
Provided is a soundproofing plate, comprising a substrate wherein a plurality of through holes are formed; and sound collecting parts, further comprising through holes in the center thereof, which approximately match the through holes of the substrate, said collecting parts having a shape wherein the diameter increases as the distance from the substrate increases. The sound collecting parts are disposed on both faces of the substrate. Or, provided is a soundproofing plate, comprising a substrate wherein a plurality of through holes are formed; and attenuation elements. The attenuation elements further comprise hollow shaft members; and sound collecting parts which are anchored on the end parts of the hollow shaft members. The sound collecting parts further comprise through holes in the centers thereof which approximately match hollow parts in the hollow shaft members; and have a shape wherein the diameter increases as the distance from the hollow shaft member increases. The hollow shaft members are disposed in the substrate so as to approximately match the through holes in the substrate. |
