1. Function: absorb sound or reduce noise and decoration.
2. Material: high quality MDF, fireproofing cloth, painted facing.
3. Theory: adjust structure of grooved the front and perforated the back and change groove width and hole depth, volume of the back cavity, we can get different absorption effect on different frequency.
4. Character: fireproof, moistureproof, beautiful, Environmental protection, easy-installation and long-using
5. Type: 28/4, 29/3, 12/4, 13/3, 14/2
6. Specification: L2440mm X W128mm X H25mm(or customer made)
7. Application: Broadcast station, TV station, library, theater, opera house, hotel, meeting room, church, factory, shop, gym, school etc.
8. 28/4 Absorption coefficient:

Type 13PMK	Center frequency (Hz)	125	250	500	1000	2000	4000	Noise reduction coefficient NRC
Back cavity 50mm	Absorption coefficient a	0.43	1.08	1.12	0.97	0.90	0.92	1.02
Back cavity 100mm	Absorption coefficient a	0.65	1.05	1.02	0.94	0.82	0.83	0.96
Back cavity 200mm	Absorption coefficient a	0.95	0.97	0.92	1.03	0.90	0.92

Application: theaters, recording studio, television station, music hall, auditorium, stadium, large entertainment city, hotel, KTV, museum, library, banks, courts, multi-function hall, meeting rooms, business office, advanced villa or private living room and other public places for improvement of the environment.

Characters:
1. Technology products: materials based on acoustic theory, remarkable sound-absorbing function, middle and low frequency sound-absorbing effects especially renowned.
2. Art products: both natural wood grain and natural beauty; reflected the culture of modern rhythm brilliant style, excellent cosmetic products, based on natural tree decorated with the needs, design and other ornaments results provide a good visual effects enjoyment.
3. Green products: all materials comply with national environmental standards, very low levels of formaldehyde, and products has natural fragrant wood.
4. moisture-proof and mold-proof: sound-absorbing panels take full use of specially processed high-density moisture-proof board to ensure moisture-proof performance of products .
5. Security commitments: highest wood fire-proof level B1. This is adopted by the authority of the State sector.
6. Easy installation: standardized modular design, install with keel (wood or steel) and clips.