Sound waves are created by vibrations, if we could see them they would resemble waves on the sea or ripples on water. These vibrations can vary with the amount of pressure created, the pitch and tone of each wave, our acoustic barriers are a tried and tested way of absorbing, blocking and reflecting these sound waves.
In acoustics, the decibel is used as an absolute indicator of sound power per unit area. A decibel is one-tenth of a Bel, a seldom-used unit named for Alexander Graham Bell, inventor of the telephone.
Increasing the power of sound emitted does not increase the level of noise by the same amount, by doubling the output, the level of sound received would only increase by 3db. (e.g. If 2 people both talk at 60 decibels at the same time, the power they both emit would only create 63 decibels of sound, 4 people all talking at 60 decibels would only create 66.)
Human hearing can be sensitive with decibel levels of over 120db proven to damage human hearing for the long term. Legislation is in place to protect us from exposure to such intensity. Councils have been given the power to enforce working restrictions from the control of pollution act 1974 and the noise at work regulations 2005 is there to ensure contractors are putting measures such as our sound barriers in place to protect staff from tinnitus and other hearing related issues.
A sounds pitch differentiates due to the frequency of each sound wave, the frequency of a noise is measured by how many waves fit into a unit of time. The audible frequency range for humans is typically given as being between about 20 Hz and 20,000 Hz although the high frequency limit varies. Sound vibrates waves of pressure through the air, the more frequent the wave the higher pitch of the sound. Our acoustic barriers are specifically designed to be more effective for higher frequencies, proving more effective in blocking noise from high frequency noise emitters such as breakers, stihl saws etc.
Using Sound Barriers
As acoustic barriers are designed to block noise pollution it is important to place the acoustic fence as close to the noise pollution as is safe and practical to do so. The acoustic fence needs to face the recipients to allow the back and internal materials to absorb as much noise as possible and must be seamless to prevent noise escaping.