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Environmental Noise Control – Reducing Noise at Source

Environmental
Noise Control

Reducing Noise at Source

Environmental noise is defined as unwanted or harmful outdoor sound created by human activity such as noise emitted by means of transport, road, rail traffic, air traffic, and industrial activity.

Reducing and controlling environmental noise at source aims to prevent or reduce the harmful effects of the noise on its surrounding locations. Which can often be residential or other noise sensitive locations (NSL).

The best way of reducing noise exposure is
by controlling the noise at its source

When considering the mitigation of environmental noise caused by industrial activity, there are numerous options available that can be employed to address specific noises at their respective sources. Not only is this the most effective way to break the transmission path of the noise, but it is also the most cost-effective solution as less product and material is needed the closer you get to the source.

Types of Environmental Noise

Road Traffic Noise
Road traffic noise is probably one of the most invasive and common causes of environmental noise pollution. With the current construction boom and the growth in sites and their associated building activities, there is often a noticeable increase in the traffic servicing them. Generally consisting of heavy machinery and goods vehicles, starting very early in the morning and continuing throughout the day. This contributes to an increase in overall noise levels in the vicinity of these sites due to increased traffic.

Construction Noise
Construction noise can fluctuate a lot depending on the type of activity. Noise sources can be constant or varying depending on the type of equipment used and the location in which it is used. The time of day will also dictate the type of equipment which can be used as the acceptable noise levels for night time are much lower than for the day.

Industrial Noise
Environmental noise from industrial activities can be wide-ranging and varied in terms of its actual levels and irritability. Heating, ventilation, cooling towers, compressors, fans, pumps, and chillers can all be problematic noise sources. Many of these units can also operate at night which can then impact severely on the background noise levels. This can be a source of considerable concern.

Mitigation measures employed against environmental noise can help reduce noise pollution significantly within these three different sectors. Installing the correct preventative measures against the noise will help reduce it to levels within the legislative limits thus reducing the negative impact on the surrounding area and its inhabitants.

Solutions to tackling the noise at source

Effective solutions to the main sources of environmental noise are readily available on the market. Typically these come as standard made noise barriers and enclosures. The most effective and cost-effective means of treating environmental noise is by treating it at its source.

Treating the noise at source is the most effective means of reducing environmental noise pollution. It reduces the risks of flanking and a variety of treatment options such as flanking, absorption and insulation solutions can be used in conjunction on different parts of the machines or processes.

Custom designed solutions and products
offer an effective solution

as they consist of targeted material composites that will address the key noise sources.

Acoustic Enclosures & Screens
Are designed to surround noisy equipment that contributes unwanted noise to their environments. This can include generators, CHPs, chillers, duct wraps, fans, motors, cooling towers, and other plant equipment. Both rigid and flexible solutions can offer up to 50dB reduction for both indoor and outdoor applications.

Acoustic Attenuators
Attenuators are designed to reduce the amount of noise travelling along an air-path. Typical applications include refrigeration units, cooling towers, plant rooms, processing plants, generators, and rooftop ventilation units.

Acoustic Louvres
Louvres absorb noise to reduce the sound transmission, while also providing adequate airflow from buildings to achieving the required acoustic performance.

Anti-Vibration Mounts
Anti-vibration mounts are used to reduce noise by isolating vibrations from the main source or body. Industrial and process machinery benefit from the installation of mounts as they not only reduce noise levels but can also reduce wear and tear on the machinery. These are tuned composite materials that are designed to absorb, reduce and stop the transmission of unwanted frequencies and vibrations.

The biggest challenge in
treating environmental
noise control is in specifying
the correct solution.

Identifying a product that will more effectively treat the noise of the source is also the most cost-effective and straightforward approach to the problem.

Ventac works with companies from a range of different sectors including the food and drink industry, energy, utilities, data centers, and industrial manufacturing to support in the identification of specification of effective solutions for environmental noise.

Contact a member of our
Building & Industrial Noise Control Team

to find out more about our solutions

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