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eLibrary > BS EN ISO 11819-1:2023 Acoustics. Measurement of the influence of road surfaces on traffic noise - Statistical pass-by method >

BS EN ISO 11819-1:2023 Acoustics. Measurement of the influence of road surfaces on traffic noise - Statistical pass-by method, 2023

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BS EN ISO 11819-1:2023 Acoustics. Measurement of the influence of road surfaces on traffic noise - Statistical pass-by method, 2023

undefined
European foreword
Endorsement notice [Go to Page]
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions [Go to Page]
3.1 Types of noise
3.2 Measurement method
3.3 Road speed categories
3.4 Vehicle categories
3.5 Measured noise quantities
3.6 Road surface terms applicable in this method
3.7 Backing board terms
4 Symbols and abbreviated terms
5 Measuring principle
6 Instrumentation [Go to Page]
6.1 Instruments for acoustical measurements [Go to Page]
6.1.1 General
6.1.2 Verification
6.2 Instruments for vehicle speed measurements [Go to Page]
6.2.1 General
6.2.2 Verification
6.3 Instruments for temperature measurements [Go to Page]
6.3.1 General
6.3.2 Verification
7 Test sites [Go to Page]
7.1 Selection of measuring site
7.2 Deviations from free-field conditions
7.3 Considerations of guard rails and other barriers which can reflect or screen the sound
7.4 Surface between the tested road surface and microphone
7.5 Backing board
8 Traffic conditions [Go to Page]
8.1 Vehicle classification
8.2 Selection of vehicles for measurement
8.3 Minimum number of vehicles
8.4 Road speed categories
9 Measuring procedure [Go to Page]
9.1 Microphone position
9.2 Calibrations
9.3 Sound level measurement
9.4 Frequency spectrum measurement
9.5 Speed measurement
9.6 Temperature measurement
10 Meteorological conditions [Go to Page]
10.1 Wind
10.2 Temperature
10.3 Recommendations on road surface moisture
11 Background noise
12 Normalization of data [Go to Page]
12.1 Compensating for the effect of the additional (higher) microphone position
12.2 Combining vehicle categories H2 and H3+ into a common heavy vehicle category H
12.3 Noise versus speed - regression analysis (for passenger cars)
12.4 Noise versus speed – normalization to reference speed (for heavy vehicles)
12.5 Noise versus speed – normalization of frequency spectra for vehicles in categories P and H
12.6 Determination of SPB sound level at reference speeds
12.7 Useful speed range for the speed normalization
12.8 Correction of sound levels according to temperature
13 Measurement uncertainty
14 Reported data [Go to Page]
14.1 General information
14.2 Information relating to the location and appearance of the test site
14.3 Information relating to the type and construction of the tested road surface
14.4 Information relating to the condition of the tested surface and environmental factors
14.5 Road speed category and vehicle information
14.6 Measured and calculated sound level and speed data
14.7 Others
Annex A (normative) Vehicle categories
Annex B (informative) Determination of the statistical pass-by index (SPBI)
Annex C (informative) The backing board variant
Annex D (informative) Adding 95 % confidence intervals
Annex E (informative) Validity and stability of the method
Annex F (informative) Reference road surface
Annex G (informative) Monitoring the stability of sound levels of vehicle fleets
Annex H (informative) Uncertainty
Annex I (informative) Example of test report
Bibliography [Go to Page]

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BS EN ISO 11819-1:2023 Acoustics. Measurement of the influence of road surfaces on traffic noise - Statistical pass-by method, 2023

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