K.1
General requirement
K.1.1 The manufacturer shall state the values of the noise emissions at personnel positions. K.1.2 To achieve compliance with the Machinery Directive the measurement of the noise
emissions shall be made using the test code as set out in K.2.
K.2
Determination of the sound pressure level
K.2.1 The A-weighted emission sound pressure level at the personnel positions shall be
determined. The measurements shall be carried out at the personnel positions and under the operating conditions set out in Table 13.
Test number
Personnel positions Microphone positions to determine the emission sound pressure level at the
personnel positions
Operating conditions for measurement
1 Personnel places with seats inside cabs
Measuring point at a height of 0.8 m centrally above the seat surface
Vehicle travelling at maximum speed on track with a range of features (that is measurement to include switches and crossings and jointed track as appropriate)
2 Personnel places with seats inside cabs
Measuring point at a height of 0.8 m centrally above the seat surface
Vehicle in working condition, full load and maximum engine speed
3 Personnel places with standing positions on vehicles
Measuring point at a height of 1.60 m centrally above the standing position of personnel
Vehicle in working condition, full load and maximum engine speed
4 Personnel places with standing positions beside vehicles
Measuring point at a height of 1.60 m above rail level centrally above the standing position of personnel
Vehicle in working condition, full load and maximum engine speed
5 Personnel places at which operators are present beside the vehicle with control panels
Measuring point 1.60 m above rail level centrally above the control panel
Vehicle in working condition, full load and maximum engine speed
Table 13 Noise measurement of personnel areas (working condition is for travelling and working mode)
G K.2.1.1 The measurement of noise should be carried out by competent personnel. An acceptable methodology for measuring sound pressure level is given in EN ISO 11201:1996. Further guidance on noise measurement is set out in 2.3 of GM/GN2460.
K.2.2 Further specified positions for the determination of the emission sound pressure level are described by the position of axis A in Table 14. The microphone shall be positioned above axis A at a distance of 1 m from the reference box (see EN ISO 3744:1995, clause 3.10) and 1.70 m above the upper edge of the rail of the adjacent track. The microphone shall be moved with the vehicle in both working and travelling mode. The definition of the reference box components of the vehicle, which can swing out, are not to be taken into consideration. Test number Noise creating components Microphone positions to determine the emission sound pressure level at the
personnel positions
Operating conditions for measurement
6 Engine blocks or generators
Axis A at right angles to the track and on the centre line of the exhaust and through the openings of the air intake
Vehicle in working mode, full load and maximum engine speed.
7 Group of grinding tools (grinding machine)
Axis A at right angles to the track and on the centre line of a group of grinding stones
Vehicle in working mode, full load and maximum engine speed.
8 Equipment for ballast grading
Axis A at right angles to the track through the end of the plough or brush at its most extended position
Vehicle in working mode, full load and maximum engine speed.
9 Pass by noise As set out in K.3.2 Vehicle travelling at maximum speed on track with maximum engine speed
Table 14 Noise measurement of vehicle
K.2.3 If required the C-weighted peak sound pressure level shall be determined at the personnel positions or specified positions.
K.3
Sound power level determination
K.3.1 For measurements taken in accordance with Table 14 the A-weighted sound power level shall be determined in accordance with EN ISO 3744:1995.
K.3.2 Because the length of the reference box of vehicles might exceed 7 d (the measurement distance d is the perpendicular distance between the reference box and the measurement surface, see EN ISO 3744:1995, clause 7.3), the sound power level shall be determined as follows: on both sides of the vehicle there are five microphone positions on a vertical line, see Figure 27. For vehicles where the noise levels are the same on both sides of the vehicle measurements need to be taken only on one side. The distance between these vertical lines and the reference box shall be 1 m. The track with the vehicle on it and the adjacent track shall be on the same height and shall lie in a straight line. The definition of the reference box components of the vehicle, which can swing out, are not to be taken into consideration
K.3.3 The measurement shall be taken while the vehicle is passing in operating mode. The measurement starts when the front of the vehicle, defined by the front of the reference box, is at a distance of 3 m to the axis crossing the track through the microphones. The
K.3.4 There is no environmental correction K2 because the measurement is taken out in a free field (see EN ISO 3744:1995, clause A.1). As the measurements shall be taken outdoors the test environment is considered to be an acoustic free field over a sound reflective plane. Thus the environmental correction K2 is assumed to be less than 0.5 dB and therefore negligible. To avoid the influence of any sound reflecting objects in the open test site, observe the requirements in EN ISO 3744:1995, clause A.1.
K.3.5 For the calculation of the sound power level average measurement of the surface, use EN ISO 3744:1995, clause 8. 0.80 m 0.80 m 0.80 m 0.80 m 0.80 m 1.0 m Microphone position Reference box
Figure 27 Microphone positions to measure pass by noise
K.4
Installation and mounting conditions
K.4.1 The installation and mounting conditions shall be identical for the determination of both the sound power level and the emission sound pressure level at specified positions.
K.4.2 For the purpose of measurements, the vehicle shall work on a track, which is part of a sound reflecting plane outdoors providing the necessary free field above the reflecting plane.
K.5
Operating conditions
K.5.1 The operating conditions shall be the same for the determination of the sound power level and of the emission sound pressure level at the personnel positions and specified
positions. The operating conditions of the vehicles are defined in Tables 13 and 14.
K.6
Measurement uncertainties
K.6.1 The application of the proposed noise emission measurement methods results in different measurement uncertainties. These are to be stated as standard deviations of
reproducibility in the basic noise emission measurement standards. Thus a standard deviation of reproducibility sR of 0.5 dB - 2.5 dB is expected for the A-weighted emission sound pressure level determined in accordance with EN ISO 11201:1996.
K.6.2 In considering the sound power level determination according to EN ISO 3744:1995 a standard deviation of reproducibility sR of 0.5 dB - 1.5 dB is required.
K.7
Information to be recorded
K.7.1 The information to be recorded shall cover all of the technical requirements of this noise test code. Any deviations from the noise test code or from the basic standards upon which it is based shall be recorded together with the technical justification for such deviations.
K.8
Information to be reported
K.8.1 The information to be included in the test report shall be at least that which the
manufacturer requires to prepare a noise emission declaration or the user is required to verify the declared values.
K.8.2 The following minimum information shall be given:
a) Identification of the manufacturer, vehicle type, vehicle model, serial number and year of production.
b) Place and date of the test and personnel involved.
c) Reference to this noise test code and the basic standards applied. d) Description of installation and operating conditions.
e) Location of personnel positions and other specified positions.
f) Description of microphone positions (personnel position and other specified positions). g) Description of the measurement instrument and year of calibration.
h) Description of the test environment including background and environmental corrections.
i) Determined noise emission values:
i) emission sound pressure level LpA at the personnel positions and other specified
positions.
ii) LpCpeak if required.
iii) sound power level LWA.
j) Confirmation that all requirements of this noise test code have been fulfilled, or, if this is not the case, any unfulfilled requirements have been identified. All unfulfilled requirements shall be specified; deviations from the requirements shall be stated and technical justifications for the deviations shall be given.
K.9
Declaration and verification of noise emission values
K.9.1 The declaration of the noise emission values shall be made as a dual number noise emission declaration according to EN ISO 4871:1996. The declaration shall state the emission sound pressure level LpA at the personnel positions or at other specified positions and if necessary the sound power level LWA together with the respective uncertainty K (KpA and KWA).
K.9.2 If necessary the peak sound pressure levels LpCpeak shall be given together with its uncertainty KpCpeak.
K.9.3 The uncertainties of measurement KpA, KWA and KpCpeak are expected to have values of 3 dB each.
K.9.5 The noise emission declaration shall explicitly state that the emission values have been measured according to the specification of this noise test code as well as to EN ISO 11201:1996, respectively EN ISO 3744:1995. If this statement is not true, the noise emission declaration shall indicate clearly what the deviations are from this noise test code and / or from the basic standards.
K.9.6 The noise emission declaration shall be part of the manufacturer's instruction handbook. G K.9.6.1 An example of a noise emission declaration according to B.2 of
EN ISO 4871:1996 is set out in Figure 28 .
Vehicle number ... ... ... ...
Type: ... ... ... ... Model: ... ... ... ... ....
Declared dual-number noise emission values in accordance with EN ISO 4871 Scope of use of machine during test:
Load No Load
Measured A-weighted emission sound pressure level LpA (ref 20
μPa) at the operator's position in dB(A) nn nn
Uncertainty KpA in dB 3 3
Measured A-weighted sound power level LWA (ref 1 pW) in dB(A) nn nn
Uncertainty KWA in dB 3 3
Values determined according RIS-1530-PLT, EN ISO 11201 and EN ISO 3744
NOTE The sum of a measured noise emission value and its associated uncertainty represents an upper boundary of the range of values that are likely to occur in measurements.