BS ISO 18564:2016 pdf free download.Machinery for forestry – Noise test code.
This noise test code specifies all the information necessary for carrying out efficiently and under standardised conditions the noise emission values of self-propelled forestry machinery. It is applicable to fellers, bunchers, dehmbers, forwarders, log loaders, skidders, processors, harvesters, mulchers and multi-function versions of these machine types, as defined in ISO 6814.
Noise emission characteristics Include A•welghted emission sound pressure values at the operator’s station and the A.weighted sound power value, The determination of these quantities Is necessary for the following:
— manufacturers to declare the noise emitted;
— comparing the noise emitted by machines in the family concerned;
— purposes of noise control at the source at the design stage.
NOTE For low-noise design, noise emission values in frequency bands are uselul and the basic International
Standards ISO 3744 and ISO 11201 can be used for determining noise emission quantities in frequency bands.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the btest edition of the referenced document (including any amendments) applies..
ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field wera reflecting plane
ISO 4871, Acoustics — Declaration and verification of noise emission values of machi nesy and equipment
ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat
ISO 6395:2008, Earth-moving machinery — Determination of sound power level — Dynamic rest conditions ISO 6396:2008, Earth-movIng machinery — Determination of emission sound pressure level at operator’s position — Dynamic test conditions
ISO 11201, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections
3 Emission sound pressure level determination at the operator’s station
3,1 For the measurement of the A-weighted emission sound pressure levels, ISO 11201 shall be used.
3.2 The following emission sound pressure levels shall be determined at the operator’s station:
5 Installation and mounting conditions
5.1 The machine instalbtion and mounting conditions as specified by the manufacturer in the Instruction handbook shall be applied.
5.2 For the purposes of BS ISO 18564, the test environment specified in ISO 3744:2010. Clause 4 and Annex A. apply. Additional requirements are given in LI to £.
Humidity, air temperature, barometric pressure, vibration and stray magnetic fields shall be within the limits specified by the manufacturer of the instrumentation.
5.3 The test area shall be a hard reflective surface defined as an area bordered by the vertical projection
of the microphones to the ground consisting of concrete or non-porous asphalt.
5.4 The requirements for background noise, as specified in ISO 3744. shall be fulfilled. Corrections for
background noise shall be made as specified In ISO 3744:2010.8,3.2.
5.5 Measurements shall not be carried out under the following conditions:
a) when there Is precipitation. I.e. rain, snow or hail;
b) when the ground surface Is covered with snow;
c) when the temperature is below -10 C or above .35 C;
d) when the wind speed exceeds H mis; for wind speeds In excess oF 1 m/s, a microphone windscreen shall be used and appropriate compensation for the effect of Its use allowed for when calibrating.
5.6 For test-site measurement ground surfaces consisting of a hard reflecting plane, such as concrete or nonporous asphalt (5,), and having negligible sound-reflecting obstacles within a distance from the source equal to three times the measurement hemisphere radius, it may be assumed that the absolute value of environmental correction, K2A. is less than or equal to 0.5 dB, and can therefore be disregarded. In this case. K2A shall be equal toO dH.
6 OperatIng conditions
6.1 The operating conditions shall be the same for the determination of both A.weightcd emission sound pressure values at the operator’s station and the exterior A-weighted sound power value at specified conditions unless otherwise stated below.
Unless otherwise specified, all machines shall be stationary with the tools operating., unloaded, idling at the 75 * 5% of manufacturer’s rated maximum efficiency engine speed. The machine shall be properly warmed up and stabilized at the normal operating temperature before testing starts.
Adjustments shall be made to ensure that no tools cause additional noise through an unintentional mechanical contact
If a cab is fitted, the sound pressure level shall be measured with all openings, doors, windows, hatches and windscreen closed.
Measurements shall be taken with the air-conditioning and/or ventilation system(s) in operation. If there is more than one operating speed available, the air condltionIngand/or the pressurized ventilation system(s) shall be operated at the second speed for systems with up to four speeds.
For systems with more than four speeds, the third speed shall be used and, for systems with infinitely variable speeds, the mid.range speed.
7.7.1 The noise of muichers is measured with the mulching work cycle only. A tree muiching work cycle is performed without tree handling.
7.7.2 The mulching cycle is as follows:
a) in the beginning. the mulching head Is kept [or 10 a as close as possible to the ground level but no parts touching the ground. Rotating parts arc functioning.
b) Then, the mulching head is elevated to maximum working height for 5 s. After that, the head is laid down to position as in a).
7.7.3 The period of noise measurement observation shall consist of three at least three work cycles as described In L22.
7.7.4 During the measurements, the movement speed of the boom shall be 75 % of the maximum speed defined by the manufacturer. The work cycle time shall be measured and reported.
The noise of skidders is measured according to ISO 6395:2008. Annex G (grader cycle).
7.9.1 The noise of forwarders Is the combined noise of the loading work cycle and the forwarding work cycle.
7.9.2 The loading work cycle is as follows:
When the loading work cycle begins, the grapple of loader Is fully open In the middle point of the load bunk. From that point, the grapple is turned and extended towards a point which is 450 ± 5° to the right hand side of the operator and distance Is 75 % ± 500 mm of the maximum reach of the boom. A the same time, the grapple Is lowered to a height which Is 250 mm ± 100 mm over the ground level measured from the lowest point of the grappic. At this point, the movement of the boom is stopped for a while and the grapple is closed. After that, the grapple is brought to the beginning point in the middle of the load bunk
7.9.3 The period of one noise measurement observation shall consist of at least two work cycles as described in ZjZ. The movement speed of the boom shall he 75 % ± 5 % of the maximum during the measurements and defined by the manufacturer. The work cycle times shall be measured and reported.
7.9.4 For forwarding noise value measurements. machines with pneumatic tyres shall be operated on a dry, concrete or tarmacadam surface (or other hard surface with no loose material), horizontal to within 2°, free from gravel leaves, snow, etc. Tracked or metal-wheeled machines shall be operated on a smooth, horizontal grassland or soil surface free from long grass vegetation The test track or course shall have a straight section long enough to ensure that the machine speed is stabilized for an adequate time for measurements to be made.
The machine shall be ballasted. Wheeled machines shall be fItted with typical pneumatic tyres. not more than 50% worn. Before the noise measurements, it shall be established by a power take-off test or other means that the power of the machine is within 5% of the manufacturer’s rated value.
BS ISO 18564:2016 pdf free download.Machinery for forestry – Noise test code.