EN 16272-4:2016
Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 4: Intrinsic characteristics - In situ values of sound diffraction under direct sound fiel

Standard No.

EN 16272-4:2016

Release Date

2016

Published By

European Committee for Standardization (CEN)

Latest

EN 16272-4:2016

Replace

FprEN 16272-4-2015

Scope

This European Standard describes a test method for determining the intrinsic characteristics of sound diffraction of added devices installed on the top of railway noise barriers. The test method prescribes measurements of the sound pressure level at several reference points near the top edge of a noise barrier with and without the added device installed on its top. The intrinsic effectiveness of the added device is calculated as the difference between the measured values with and without the added devices, correcting for any change in height. In other words, the method described here gives the acoustic benefit of changing the shape and materials of the top edge over a simple barrier of the same height. This is an intrinsic characteristic of the added device, provided that the source and receiver positions are standardized. In practice, when the added device is placed over an existing barrier, it raises the height and this provides additional screening, depending on the source and receiver positions; this additional screening is not considered in this European Standard. The test method is intended for the following applications:- preliminary qualification, outdoors or indoors, of added devices to be installed on noise barriers; - determination of the sound diffraction index difference of added devices in actual use; - comparison of design specifications of an added device with actual performance data after the completion of the construction work; - verification of the long term performance of added devices (with a repeated application of the method); - interactive design process of new products, including the formulation of installation manuals. The test method can be applied both in situ and on samples purposely built to be tested using the method described here. Results are expressed as a function of frequency, in one-third octave bands between 100 Hz and 5 kHz. If it is not possible to get valid measurements results over the whole frequency range indicated, the results shall be given in the restricted frequency range and the reasons for the restriction(s) shall be clearly reported. A single-number rating is calculated from frequency data.

EN 16272-4:2016 Referenced Document

• EN 16272-3-2:2014 Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 3-2: Normalized railway noise spectrum and single number ratings for direct field applicat
• EN 16272-6:2014 Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 6: Intrinsic characteristics - In situ values of airborne sound insulation under direct so
• EN 60942:2003 Electroacoustics - Sound Calibrators
• EN 61260:1995 Electroacoustics - Octave-Band and Fractional-Octave-Band Filters (Incorporates Amendment A1: 2001)
• EN 61672-1:2013 Electroacoustics - Sound level meters - Part 1: Specifications*， 2024-04-20 Update
• EN ISO 354:2003 Acoustics - Measurement of sound absorption in a reverberation room ISO 354:2003
• ISO 13472-1:2002 Acoustics - Measurement of sound absorption properties of road surfaces in situ - Part 1: Extended surface method
• ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

EN 16272-4:2016 history

• 2016 EN 16272-4:2016 Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 4: Intrinsic characteristics - In situ values of sound diffraction under direct sound fiel