Glasswool is a sound suppressor made of glass fiber. the key purpose on the glasswool is to reduce the audio depth...
Fungsi rockwool/ adalah mengurangi intensitas suara dari resonansi panel yang sampai ke teling... https://deborahyuca043236.blog5.net/70742462/the-smart-trick-of-timah-hitam-that-no-one-is-discussing