BS ISO 18564:2016 pdf download

BS ISO 18564:2016 pdf download.Machinery for forestry — Noise test code
1 Scope
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, delimbers, 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-weighted 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 useful 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 latest 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 over a reflecting plane
ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment
ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry — Seat index point
ISO 6395:2008, Earth-moving machinery — Determination of sound power level — Dynamic test 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:
— A-weighted time-averaged sound pressure level.
3.2.1 For operators, the microphone shall be mounted on an open-frame helmet worn on the operator’s head or on a shoulder harness in such a way that the microphone axis is horizontal and its diaphragm is 200 mm ± 20 mm to the side of the centre plane of the operator’s head, in the same vertical plane as his eyebrows and facing forwards. For seated operators, the centre of the microphone shall be 700 mm ± 50 mm above the seat index point. The seat index point shall be determined in accordance with ISO 5353. The standing operator shall be 1,75 m ± 0,1 m tall including shoes or as defined in ISO 6396:2008, 6.2 for ride-on machines and standing operator. The side of the head chosen for the microphone shall be that for which the higher sound pressure level occurs.