HIGH PERFORMANCE ACOUSTIC ABSORBER FOR A QUIETER ENVIRONMENT
Fibre-free. Maximised absorption at key "nuisance" frequencies. Proven alternative to complex "foam-barrier" multi-layers. Visco-elastic properties help to dampen resonance effects in metal panels. Reduces structure-borne noise transmission when used as isolation pads. Used in linings for automatives and heating, ventilation and air-conditioning (HVAC) systems as well as acoustic enclosures.
Effective air-borne sound absorption across a broad frequency range
Fibre-free, open-cell material with complex pore geometry
Flexible and light weight, suitable for linings in HVAC systems
Additional barrier performance, vibration damping and de-coupling (isolation) properties
Where does noise in a building come from?
Noise is commonly defined as a loud or unpleasant sound that causes disturbance. This is a deceptively simplified description of a much larger problem as noise has been proven to impact our work and learning environments. Studies have shown that noise exposure increases general stress levels and aggravates stress-related conditions such as high blood pressure, coronary disease and migraine headaches. Noise also disrupts our sleep, which would affect our mood, productivity and learning the following day.
Noise can be generated from air-borne sound or structure-borne sound. Air-borne sound is the noise you can hear and it can and will travel anywhere where air is present. A simple example of this is the sound generated from a radio which travels through the air in the form of pressure waves and is received by the person listening to it.
Structure-borne sound results from a physical vibration of materials caused by some impact or other forms of mechanical excitation. This could be a hammer striking a wall, for instance. Although you can hear the noise created from the impact, this is actually the result of vibration (structure-borne sound) that travels through a solid material (the wall) and is re-radiated as air-borne sound.
Are air-borne sounds and structure-borne sounds related?
Air-borne and structure-borne sounds are related as structure-borne sounds can cause air-borne sounds and air-borne sounds can cause structure-borne sounds when it causes the surrounding surfaces to vibrate.
Consider the example of an uninsulated metal duct: as the surface would vibrate easily, it provides a structural and an air-borne path for noise generated by mechanical equipment like fans and chillers. It is also capable of transmitting noise from other sources in the building like footsteps in the corridor or discussions in rooms. The air-borne to-structure-borne conversion can repeat multiple times until the source of sound is eliminated.