------ the production and sales of insulation materials and noise reduction equipment.
------ All kinds of mufflers, sound absorption, environmental noise control, the design of vibration control, installation and construction, consulting, decoration and so on.
------ the sound design (reverberation time, language clarity, the improvement of Boeing, etc.), construction, installation, consulting, decoration of various recording studio, studios, auditorium, concert halls, theatres, cinemas, listening rooms, home theater, Qinfang, classrooms, multi-purpose stadium, the International Conference Hall, Press Room, Lecture Hall and all kinds of construction of halls.
------ the insulation project of various soundproof doors, soundproof windows, soundproof room, soundproof enclosures, soundproof wall and so on.
------ Various anechoic chamber, semi-anechoic chamber, laboratory without sound in the water, silencer room, absorbing box, simultaneous interpretation room, hearing room, and various electronics, electrical appliances, medical, mechanical equipment, power engines, aircraft engines, and ultra-quiet anechoic laboratory and so on.
------ the noise control,noise insulation and floating floor anti-vibration of various regional civil construction in cities, air-conditioned rooms in buildings, underground garage, exhibition hall, hotels, shopping malls, supermarkets, hospitals, office buildings, residential quarters and all kinds of amusement, public buildings, stadiums and other environment .
------ The equipment noise and environmental industrial enterprises noise controling, insulation, muffler, anti-vibration of various industrial plants, thermal power plants, diesel generator room, the air compressor, HVAC system, the pumps, boiler room and so on.
------ the structural design, production and installation of acoustic controls of the isolation, damping, vibration isolation, noise barriers, for various types of track, road and along the traffic; the production and installation of insulation windows and doors along the construction noise and so on.