Sound absorption core

The utility model discloses a sound-absorbing core which comprises a zipper, a low-density sound-absorbing material plate, a high-density sound-absorbing material plate, a box body made of non-woven fabric and a cover body made of non-woven fabric, the cover body is fixed on the box body through the zipper, and a containing space is defined by the cover body and the box body. The low-density sound-absorbing material plate and the high-density sound-absorbing material plate are sequentially stacked in the containing space. The low-density sound-absorbing material plate and the high-density sound-absorbing material plate are arranged in the sound-absorbing core, low-frequency-band noise can be absorbed and isolated, meanwhile, certain high-frequency-band noise can be absorbed and isolated, and the low-density sound-absorbing material plate and the high-density sound-absorbing material plate can be rapidly installed and replaced through the zipper effect. And later maintenance is facilitated. 本实用新型公开了一种吸音芯，包括拉链、