Heavy machinery used in manufacturing goods and other related works give out lot of noise hence causing huge sound pollution. Various modern technologies are used to control this disturbance. New equipment like acoustic foam, corner bass and processes like damping treatments skilfully control noise and manage sound producing devices. Hence finding Noise and Vibration Control equipment is not searching great heavens these days.
What factors should be considered to control noise problem?
- Kind of noise
- Rate of noise and pattern
- Basis of noise(source from which it comes from
- The path through which sound travels
- room reverberation
Apart from the above, the kind of work that is undertaken, people who get affected with vibration also should be taken in to consideration. If only few people are exposed, then
Noise And Vibration Control measures should be taken in a different way like limitation of exposure and protecting from source. Ideally in any noise problem there will be three entities- a source, travelling pathway and the receiver. Hence if any of the entities is transferred from the place then noise can be reduced.
Source is the place from where mechanical waves come from. Transmission path is the way through which noise travels and determining any sources causing noise in the path will be easy with the help of noise control devices.
Receiver is the person who receives the effects of noise and vibration. It can be either workers or office personnel in the building.
Damping is one of the most popular techniques of noise control. It makes use of friction and other processes by making vibrational energy in to heat. By maximising damping you can be sure of reducing vibration. This helps in eradicating vibration travelling through the building.
Is it so important?
Yes Damping is very important becauseheavy machinery, apart from giving out lot of noise, also cause fatigue making its wear and tear quicker than usual. Since there are different types of damping it is important to understand what type of damping you need in your building.
Types of damping:
Extensional damping: It is the easiest kind of damping but may not suit all kinds of structures. There will be a type of material called Polymer which transforms vibrational energy in to heat. When it encounters with any sound it expands and then contracts. Since the material expands it is called Extensional damping. It works the best with light weighted objects because it adds some weight to your building while damping.
Constrained layer damping: This type of damping is suitable for heavy objects and heavy objects like walls and ceilings. This process involves using Polymer that turns vibrational energy in to heat. But here polymer is attached in between two sheets made up of hard metal. This is also advantageous because it does not add so much of weight to the building.
Before deciding which type of noise control system you want, it is important to estimate the extent and effect of sound in your building.