We’ve extensively tested the performance and durability of our acoustic fencing barriers, both in the lab and on-site. Independent test results show that our barriers provide class leading attenuation of noise pollution.
It’s the science behind Echo Barrier noise reduction products that makes them the most effective temporary noise reduction systems available. By taking a rigorous approach to design, our acoustic experts have perfected the six elements that determine on-site performance.
Our noise control barriers are made from a high-tech acoustic absorbent material that soaks up as much as 100% of sound at the key 300Hz-1kHz frequency range. They achieve this by cutting noise reflection and supressing sound reverberation. Some barriers on the market can actually cause more noise pollution, not less. If they haven’t been designed to include effective absorbent material, they create greater noise reflection.
Echo Barrier products are made from a unique high-tech sound-absorbing composite that’s safe, lightweight and durable. It’s also waterproof, which is crucial for consistent outdoor sound control. Acoustic barriers made from conventional absorbent materials, like rock wool and fibreglass, soak up rainwater like a sponge, reducing sound absorption by as much as half. Plus the additional weight from the water makes installation and transportation more difficult and costly.
Extensive testing has proved that our temporary acoustic barriers not only provide unparalleled field attenuation, but that they cut noise by up to 41dB in the lab.
This is particularly impressive given that our barriers are only half the weight of typical competitor products.
Mass has a major impact on the transmission of sound: the heavier the material, the less it vibrates, and the less sound passes through it.
However, as most sound goes over, not through, a barrier, increasing the mass beyond a certain point provides no additional attenuation.
Echo Barrier is the only manufacturer to have specifically designed our systems to hit this acoustic “sweet spot” to provide maximum performance at minimum weight. Our barriers are also unique in that they are specifically designed to make it very easy to add a second layer, increasing the local sound attenuation by a factor of six.
Site geometry has the single biggest impact on the effectiveness of your noise control system. The proximity of your barriers to the noise source controls the attenuation.
Acoustic barriers must be placed as close as possible to the source of noise to create a large ‘acoustic shadow’. Picture an imaginary line running from a jackhammer to your house. Place a sound barrier somewhere along that line, and you create an acoustic shadow.
The closer you can place your barrier to the jackhammer, the larger the shadow you create.
The bigger the shadow, the greater the sound attenuation, and the less noise you’ll hear.
Our barriers are designed to help you maintain optimum site geometry, even when noisy work shifts from place to place. Unlike heavier products, they’re lightweight and easy to move.
For maximum field performance, an acoustic barrier must provide the highest absorption over the critical 300Hz-1000Hz frequency range. Our high-tech acoustic barriers average an unprecedented 77% efficiency over this range, despite being less than half the thickness you’d expect if using conventional materials.
We build our noise barriers to last. Waterproof, weatherproof and UV resistant, they’ll carry on performing however long they’re in place, even in the most demanding environments. And they’ll continue to look presentable – which is important if you want to keep noise complaints to a minimum. Our research shows that people think a smart-looking barrier performs up to three times better than a shabby-looking one.
What makes our acoustic barriers work?
The best way to understand how our temporary noise control barriers deliver market-leading performance at minimum weight is to take a look under the bonnet.
Waterproof outer layer
Extremely durable and waterproof, highest quality PVC makes our acoustic barrier easy to clean and professional looking.
Top grade lightweight acoustic absorbent made from recycled material prevents sound from reflecting off the barrier.
Waterproof breathable membrane
Allows sound to be absorbed but keeps water out.
Durable reinforced mesh
Extends product life to retain acoustic performance in harsh working environments.
Designed with ease of use in mind
More product information
BSEN 60529:1992 IPX6
You need to know two key performance measurements to help you determine how effective a barrier is at cutting noise:
- The transmission loss of the barrier’s solid material – this gives you a measure of the difference in noise level with and without the barrier.
- The efficiency of the acoustic absorbent materials used over the key frequency range to assess the ability to prevent increased noise due to sound reflection.
Many temporary acoustic barriers perform well under lab conditions. But of course, it’s what happens in the field that counts.
Our products achieve best-in-class transmission loss and acoustic absorption performance in the lab and on-site. What’s more, they perform equally well in wet conditions; non-waterproof barriers can see sound absorption reduced by as much as half when it rains.
In fact, our products can actually perform better in the field than in the lab. The table below shows independent test results from a project to reduce noise from a diesel-powered trenchless excavation drill.
The results show that our acoustic barriers reduced noise by more than 5dB on-site compared with the lab data.