Active control sound proof mat comprising rice hulls and sound proof wall comprising the same

摘要

The present invention relates to an active control sound-absorbing mat and a soundproof wall including the same which can vary the thickness of a rice chaff sound-absorbing layer, rice chaff size, and rice chaff filling density in accordance with a specific noise frequency of a road. The present invention provides a sound-absorbing mat which does not use toxic polymer adhesives and is not formed into a plate shape at a high temperature and a high pressure to easily recycle or discard a sound-absorbing material. The sound-absorbing mat can control a sound absorption rate of a rice chaff sound-absorbing layer by adjusting the thickness of a housing or the weight of rice chaff and thus can actively absorb a sound in accordance with a frequency of a noise source. The sound-absorbing mat is eco-friendly since rice chaff is easily supplied and is freely discarded as a sound-absorbing material. Also, the sound-absorbing mat has a high sound absorption rate and can be used as an active sound-absorbing material since rice chaff with uniform particle size, three dimensional shape, and elasticity is used.