Macbook Speakers (M1 Air) are crackling

Does anyone knows why macbook air M1 has this crackling sound on the speaker?

Im afraid it might be a hardware issue. Maybe some debree like a small dust got stuck inside and now its causing that kind of vibration but Im not sure.

I just happen to have this issue way back last year. Now its pretty hard to sell or trade it because of the speakers crackling.

Please help.