• Environmental solutions
• Energy efficiency solutions
• Water management
• Material efficiency
• Emissions reduction and control
• Working environment improvements
• GreenSound silencers
• Machine room environment control
• Effective environmental noise control
• OptiConcept M
• Process improvement
• Maintenance services
• Production support
• Roll services
• Spares and process parts
• Recycled fiber
• Stock preparation
• Paper machines
• Board machines
• Winding and roll handling
• Service centers

GreenSound silencers

More than silencers

External and internal noise control is a vital issue, especially from the point of view of public health. As part of environmental protection requirements, noise control is a critical element that requires overall know-how and experience of industrial conditions.

Efficient silencers are required for environmental noise control. However, this is not enough. Considerations of layout aspects and total process know-how are important in the design of silent pulp, paper and board machines and a silent mill environment. Internal noise control is also important in view of better working conditions for the operators in the machine room.

Metso GreenSound absorptive silencers


Absorptive or resistive silencers operate over a wide frequency range at middle and high frequencies. The silencers have an advanced construction and are designed for industrial conditions.





Metso GreenSound reactive silencers

Reactive silencers or resonators work at lower frequencies. When environmental requirements are very strict, both absorptive and reactive silencers are needed.