Noise can simply be described as unwanted or annoying sound. Significantly high noise levels negatively impact on the human population both emotionally and physically. A noisy environment is not only difficult to work in but poses a significant health risk as well. Persons that work in such environments need to undergo regular medical check-ups so that they can be screened for hearing impairment. The main purpose of environmental noise control is to make the acoustic environment better.
There are many sources of this type of pollution other than the industrial sources. The commonest causes include architecture, the transport industry and urban planning. Air and road traffic are considered the biggest sources of pollution worldwide. Some sources are fairly easy to bring under control while others are a major challenge.
To address indoor sound levels, multiple techniques have been applied including design of party walls, exterior walls, and ceiling and floor assemblies. Special purpose rooms such as auditoria, social halls, recording and dining areas emit sound which can be controlled by putting up sound baffles or absorbers. As opposed to sound proofing, sound masking entails actively adding sounds to reduce the disturbance of certain other unwanted sounds.
Development of hybrid vehicles in efforts to control road traffic sources will need to attain a market share of about fifty percent to have a significant impact on the streets. Improving tire tread designs for trucks better shielding diesel stacks are some of the ways of curbing noise at source level. Speed control is effective since the minimum sound emissions come from vehicles moving at a speed of at least thirty kilometres per hour.
Aircrafts with quitter engines are now being adopted by a number of designers and this has gone a long way into making the environment better. Restricting flights in some sensitive areas also helps in managing the pollution. Restriction can be done through allocation of specific times for flights, allocating specific paths, runways and so on. The main disadvantages of doing this include inconveniences to travellers and unfavourable flight economics.
A number of finishes and materials can be employed in ceiling panels and acoustic walls. A good panel is one that does not interfere with the substrate. Fabric covers are used for effective maximum absorption. The covers may be modified into sound blankets or curtains that are used to cover surfaces or noisy equipment. Moreover, windows that are thicker or double glazed may also serve the same purpose.
In manufacturing industries, it is important to adopt designs that will produce the least amount of noise possible. Persons that are stationed in these places should have protective equipment and should be exposed to the environment only when necessary. Quality control departments should have their own quiet rooms where proper acoustics are fitted to keep away the disturbance.
Well planned environmental noise control can eliminate a key component of industrial, recreational or road traffic impact on the surrounding environment. Summarily, the available techniques include sound insulation, absorption, vibration, damping and isolation. Sound insulation introduces a mass barrier to prevent sound transmission. Damping works by extracting vibration energy and dissipating as heat from the thin sheet.
There are many sources of this type of pollution other than the industrial sources. The commonest causes include architecture, the transport industry and urban planning. Air and road traffic are considered the biggest sources of pollution worldwide. Some sources are fairly easy to bring under control while others are a major challenge.
To address indoor sound levels, multiple techniques have been applied including design of party walls, exterior walls, and ceiling and floor assemblies. Special purpose rooms such as auditoria, social halls, recording and dining areas emit sound which can be controlled by putting up sound baffles or absorbers. As opposed to sound proofing, sound masking entails actively adding sounds to reduce the disturbance of certain other unwanted sounds.
Development of hybrid vehicles in efforts to control road traffic sources will need to attain a market share of about fifty percent to have a significant impact on the streets. Improving tire tread designs for trucks better shielding diesel stacks are some of the ways of curbing noise at source level. Speed control is effective since the minimum sound emissions come from vehicles moving at a speed of at least thirty kilometres per hour.
Aircrafts with quitter engines are now being adopted by a number of designers and this has gone a long way into making the environment better. Restricting flights in some sensitive areas also helps in managing the pollution. Restriction can be done through allocation of specific times for flights, allocating specific paths, runways and so on. The main disadvantages of doing this include inconveniences to travellers and unfavourable flight economics.
A number of finishes and materials can be employed in ceiling panels and acoustic walls. A good panel is one that does not interfere with the substrate. Fabric covers are used for effective maximum absorption. The covers may be modified into sound blankets or curtains that are used to cover surfaces or noisy equipment. Moreover, windows that are thicker or double glazed may also serve the same purpose.
In manufacturing industries, it is important to adopt designs that will produce the least amount of noise possible. Persons that are stationed in these places should have protective equipment and should be exposed to the environment only when necessary. Quality control departments should have their own quiet rooms where proper acoustics are fitted to keep away the disturbance.
Well planned environmental noise control can eliminate a key component of industrial, recreational or road traffic impact on the surrounding environment. Summarily, the available techniques include sound insulation, absorption, vibration, damping and isolation. Sound insulation introduces a mass barrier to prevent sound transmission. Damping works by extracting vibration energy and dissipating as heat from the thin sheet.
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