What is BS EN 16272-1 - railway sound barrier lab testing about?  
Rail traffic noise is one of the main causes of environmental pollution generated by the railway system. One solution is noise barriers that block the direct path of sound waves from surrounding areas.
BS EN 16272-1 is a European Standard that covers technical specifications for the determination of airborne sound propagation under diffuse sound field conditions in noise barriers, ensuring barrier performance and noise reduction in railway applications.
BS EN 16272-1 is the first part of the acoustic performance test methods multi-series for railway track applications. BS EN 16272-1 specifies the laboratory method for measuring the sound absorption of flat noise barriers or flat claddings for retaining walls or tunnels. It covers the assessment of the intrinsic sound absorption performance of noise barriers and related devices acting on airborne sound propagation designed for railways which can reasonably be assembled inside the testing facility described in EN ISO 354.
Note: The test method in EN ISO 354 is based on measurements in a reverberation room where diffuse sound field conditions prevail. As a uniformly applicable method for the determination of the sound absorptive performance of noise-reducing devices under free field conditions is still under development, the measurement results according to BS EN 16272-1 are temporarily considered relevant for application on noise-reducing devices in reverberant as well as in free field conditions.
Who is BS EN 16272-1 - railway sound barrier lab testing for? 
BS EN 16272-1 on railway sound barrier lab testing is relevant to manufacturers and suppliers of noise barriers to the railway authorities for installation. BS EN 16272-1 is specifically useful to their design and product innovation teams for testing the effectiveness of new products that they design. BS EN 16272-1 is useful for:
- Manufacturers and suppliers of noise barriers
- Product development / innovation teams
- Quality control teams
- Contractors
- Construction / civil engineers
- Railway management / maintenance authorities
- Health and safety inspection authorities
- Mechanical engineers
Why should you use BS EN 16272-1 - railway sound barrier lab testing?  
Where a sound-reflecting surface is installed along a railway, it may be effective to use sound-absorbing devices on its rail side to reduce additional noise nuisance caused by reflected sound. This treatment may be needed in the presence of the following:
- Noise barriers, rocks, or retaining walls that can reflect sound waves toward unprotected areas
- Vertical cuttings or reflective surfaces that face each other
- Tunnels and their approaches
- Trains passing close to a barrier where reflections between the train and the barrier may give rise to a reverberant field and thus reduce barrier effectiveness
BS EN 16272-1 specifies a test method for assessing the sound absorption performance of noise barriers and related devices acting on airborne sound propagation designed for railways (a measure of intrinsic performance).
The test is designed to allow the intrinsic sound absorption performance of the device under test to be measured. The resulting rating should aid in the selection of devices for particular railway applications.
This method may be used to qualify noise-reducing devices for other applications, e.g., to be installed along roads or nearby industrial sites. In such cases, the single-number ratings should be calculated using an appropriate spectrum. 
The test method in EN ISO 354, referred to in BS EN 16272-1, is strictly valid only for flat absorbers and excludes devices that act as slightly damped resonators.
The adoption of BS EN 16272-1 helps to minimize risks to adjacent premises, or to rail users in confined corridors, ensuring the quality, performance, and longevity of noise barriers and related devices in railway applications.  Effective noise barriers contribute to quality of life by mitigating hearing loss risks for those living or working around railway tracks.
