The Silent Heroes of Noise Control and Acoustic Testing

Noise control is one of those things that when it’s done right you don’t know about it but when it hasn’t been done at all you know all about it. Generally legislation requires effective measures to be in place for numerous situations so in most built up areas we don’t give it a second thought but every now and again we are struck by noise from a passing vehicle or a faulty air conditioning system and we think, how can anyone live with that noise?
If noise control was not enacted we would live in a very different world. Thankfully it is. When such control needs to be implemented a specialist noise control technician will carry out comprehensive acoustic testing. The purpose of this acoustic testing is to determine the exact source and cause of the undesired noise in order to find an effective remedy to implement.
Industry is one area that requires a lot of acoustic testing and implementation of noise control solutions. When you have large plant machinery generating tremendous amounts of noise it may seem obvious what the source is. But acoustic testing is not just about finding the source of the noise, it is also about tracking the way noise travels through the structure. Without properly assessing the noise pathway inadequate control solutions could be implemented.
An example of this would be where acoustic baffles or jacketing were erected around a machine but noise travelled from the base of the machine, reverberating through steel girders beneath and resonating near office space. Acoustic testing would detect this noise pathway and make it clear that dampers or some other control solution were required.
Vehicles also require acoustic testing so that they can be designed to minimise noise outputs. In the case of vehicle production acoustic testing is carried out in the design phase so problems with unwanted noise are very rare in the finished production vehicle. But many vehicles such as coaches are adapted from production vehicles or production chassis’ and reconfigured to the buyer’s specifications. Where this is the case it is rarely cost effective to design the adjustments in computer modelling systems that might prevent unexpected noise. This process can also involve a lot of improvised fabrication. The result can be a vehicle that produces excessive noise but the source of that noise is unclear.
Acoustic solutions are also necessary for keeping buildings free of noise. There are main factors to consider in building noise control, active and passive sources of noise. Concert halls are structured to control passive noise very carefully. If the sounds of the audience are reflected around the auditorium and the sound of the players is muffled then no one will enjoy their concert experience and that concert hall will quickly go out of How To Cancel Wsj Subscription.
While few concert halls suffer from noise control issues many classrooms do. Reverberations can produce an echo effect that cancels out or disrupts the source of the sound. If a teachers voice is being reverberated Be Your Own Financial Advisor around the classroom then children cannot hear the teacher clearly and learning is made more difficult. The problem is particularly acute for children who already have hearing or learning difficulties.

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