Structure: Wood perforation plate, micro-perforated cotton is inner set, fixed cavity.

Feature:
1. High absorption coefficient for full frequency and low frequency
2. Dust-free polluted
3. Installation error will be reduced greatly
4. Simple installation, short construction period, low installation cost
5. Fireproof performance of nonflammable class B1 can meet the requirement of Fire Protection Engineering

6. Generous and beautiful decoration effect
7. Adjust the perforation rate, color of board, specification of micro-perforated cotton and installation distance according to acoustic needs
Technology support: National patent products, patent application number: 200520002028.5, 200520000456.4.