Products using polyurethane sponge material,through the special treatment equipment to form a triangular groove shape,and then by the complex process of foam made of ,sound-absorbing,noise, sponge material. It is filled with small gaps and semi-opening structure can absorb the incoming sound to attenuate the sound waves,reduce the interference and reverberation of the reflected sound and improve the purity of the sound.It is a high-performance product of sound-absorbing and noise-reducing materials.