Acoustic Fencing – The Most Common Questions | Blog | Jacksons Security Fencing

2022-05-14 19:20:15 By : Ms. Susan Xie

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Guaranteed for 25 years, our absorptive and reflective acoustic barriers reduce noise, increase privacy, and provide security, and can even be CE marked for road infrastructure.

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Whether you're looking for advice on a high security or schools project or want to know more about acoustic barriers, we've got a wide range of guides covering these topics available for immediate download.

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We understand the various challenges our customers face and over the years we have delivered many successful projects and solutions to the highest standard across all applications and sectors throughout the UK and across the world. View some of our case studies in various sectors

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We have teams located at each of our three fencing centres and fencing managers located throughout the UK ready to respond to your enquiry.

With a vast amount of experience providing fencing for many applications, we share advice from our industry knowledge about keeping a site safe and secure, product detail and information for architects, specifiers, contractors and end-users.

The effects of frequent loud noise can be extensive; increasing stress, interfering with sleep and much more. The World Health Organisation (WHO) recommends outdoor sound levels of 50 dBA to prevent people becoming ‘moderately annoyed’, but many of the noises we encounter on a daily basis exceed this recommendation.

Incorporating acoustic barriers can reduce the amount of noise pollution in an area, either through reflecting or absorbing sound from the source. To help you understand what to expect from acoustic fencing, we’ve answered the most common questions about it here:

First of all we would strongly recommend contacting a qualified sound engineer who will specify the type, length and most critically, the correct height of the barrier to ensure optimum performance is achieved. There are a variety of factors which should be taken into consideration before purchasing your acoustic barrier, which include the surrounding environment, the proximity of the noise source to the barrier and the receiver. A realistic dB reduction could be between 9-15 decibels – this reduction to the human ear represents a halving of sound. If you consider road traffic rates as 70dB and conversational speech at 60dB, that’s a dramatic drop in volume!

There are a host of factors that differentiates a certified acoustic fence from a normal domestic fence but the key differences are the following

An acoustic barrier requires a minimum surface mass density of at least 10kg per M2. This is because a mass of this weight will start to reflect noise back, rather than allowing it to simply travel straight through– a domestic fence produces circa 4kg per M2 whereas the Jakoustic barrier produces 25kg!

An acoustic barrier needs to be completely imperforate so sound cannot travel through – a domestic fence by nature will generally have some gaps throughout it’s design, after all, it’s designed for screening only and not to reduce noise.

An acoustic barrier should have a life of at least 20 years. Fortunately for us, all of Jacksons products, regardless whether it’s an acoustic fence or not, are guaranteed for 25 years. Of course a general timber fence from elsewhere would not have such a guarantee or design life.

As long as acoustic fencing meets certain requirements, it will provide sound reduction. The effectiveness of an acoustic fence is determined by five main factors:

Material density: greater mass provides greater sound reduction.

Barrier construction: good structural integrity is critical to performance. Gap-free construction eliminates direct paths for sound through the barrier.

Barrier height: Sound barriers create an acoustic shadow in which the free flow of sound waves is blocked. Higher fences change the direction of sound by the greatest angle and increase the size of the ‘shadow zone’.

Distance between noise source and receiver: A certain amount of noise is diffracted by acoustic barriers, most audible to anyone standing in such a way that the barrier is an equal distance between them and the noise source. To avoid the effects of this diffraction, acoustic barriers should be built as close as possible to either the noise source or those being protected from the noise.

Relative height of source and receiver with respect to barrier: Ultimately, taller walls reflect and absorb sound better. It’s also important to consider the height of the noise source; the lower a source sits, the greater the angle of reflection will be, increasing the shadow zone.

Acoustic fencing doesn’t have any special planning permission requirements except those that apply to regular fences. For example, if a fence will be over one metre high and next to a highway or footpath next to a highway, or if it will be over two metres high, regardless of location, you need to apply for planning permission. No matter the height of your fence, it is always best to consult the local authority before installation.

Find out more about our acoustic barriers.

Jacksons Security has a range of products relating to this article, all complete with our 25 year service life guarantee. If you cannot find the item you are looking for, please do not hesitate to call our friendly sales team.

We have completed a large number of Acoustic projects in various sectors, from housing, retail, leisure and education, to hospitals and healthcare, transport, utilities, and high security CPNI sites. Discover more through our portfolio of Acoustic case studies.

We have an extensive library of Acoustic blogs covering a wide selection of topics, whether you need a helpful guide for recognising accreditations, an understanding of different processes such as our unique timber treatment or CE marking regulations for noise barriers.

From design and manufacturing to supply and installation, we can help you with your project. If you'd like to discuss anything in this article or need information or guidance, please feel free to contact us at any stage to discuss your requirements.

© Jacksons Fencing 2022 | Stowting Common Ashford | Kent TN25 6BN | T: +44(0)1233 750393 | F: +44(0)1233 750403 security@jacksons-fencing.co.uk

© Jacksons Fencing 2022 | Stowting Common Ashford | Kent TN25 6BN | T: +44(0)1233 750393 | F: +44(0)1233 750403 security@jacksons-fencing.co.uk

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