EN 27182:1991
(Main)Acoustics - Measurement at the operator's position of airborne noise emitted by chain saws (ISO 7182, ed. 1984)
Acoustics - Measurement at the operator's position of airborne noise emitted by chain saws (ISO 7182, ed. 1984)
Specification of a method for measuring the A-weighted and octave band sound pressure levels, at the operator's position, of noise emitted by portable, hand-held combustion engine chain saws for use primarily in forestry. The operating conditions during measurement simulate normal operating conditions in the forest.
Akustik - Messung des von Handkettensägen abgestrahlten Luftschalls am Ohr des Benutzers (ISO 7182, Ausg. 1984)
Acoustique - Mesurage au niveau de l'oreille de l'opérateur du bruit émis par les scies à chaîne (ISO 7182, éd. 1984)
Akustika - Merjenje hrupa verižnih žag v zraku na mestu uporabnika (ISO 7182:1984)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Akustika - Merjenje hrupa verižnih žag v zraku na mestu uporabnika (ISO 7182:1984)Akustik - Messung des von Handkettensägen abgestrahlten Luftschalls am Ohr des Benutzers (ISO 7182, Ausg. 1984)Acoustique - Mesurage au niveau de l'oreille de l'opérateur du bruit émis par les scies a chaîne (ISO 7182, éd. 1984)Acoustics - Measurement at the operator's position of airborne noise emitted by chain saws (ISO 7182, ed. 1984)65.060.80Gozdarska opremaForestry equipment17.140.20Emisija hrupa naprav in opremeNoise emitted by machines and equipmentICS:Ta slovenski standard je istoveten z:EN 27182:1991SIST EN 27182:1999en01-november-1999SIST EN 27182:1999SLOVENSKI
STANDARD
SIST EN 27182:1999
SIST EN 27182:1999
SIST EN 27182:1999
nal Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEXflYHAPO~HAR OPrAHM3A~MR l-lo CTAH,QAPTH3ALlMM*ORGANlSATlON INTERNATIONALE DE NORMALISATION Acoustics - Measurement at the operator’s position of airborne noise emitted by chain saws Acowstiqwe - Meswrage au niveaw de l’oreille de l’opkratewr dw bruit 6mis par /es sties 6 chal”ne First edition - 1984-11-01 UDC 534.61 : 621.936.6 : 634.0.36 Ref. No. IS0 71824984 (E) Descriptors : acoustics, saws, tests, acoustic tests, determination, noise (sound), airborne sound, sound pressure. 0 cn - Price based on 3 pages SIST EN 27182:1999
Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 7182 was prepared jointly by Technical Committees ISO/TC 23, Tractors and machinery for agriculture and forestry, and ISO/TC 43, Acoustics. 0 International Organization for Standardization, 1984 Printed in Switzerland SIST EN 27182:1999
INTERNATIONAL STANDARD IS0 7182-1984 (E) Acoustics - Measurement at the operator’s position of airborne noise emitted by chain saws 1 Scope and field of application This International Standard specifies a method for measuring the A-weighted and octave band sound pressure levels, at the operator’s position, of noise emitted by portable, hand-held, combustion engine chain saws for use primarily in forestry. The operating conditions during measurement simulate normal operating conditions in the forest. NOTE - This International Standard is based on the general guidelines of IS0 6081; however, to simulate a normal operating situation of a chain saw an absorbing ground is specified instead of a reflecting plane. 4 Acoustic environment 4.1 Open space The test site shall be an open space having a radius of at least 10 m which shall be completely free from obstructions which might influence the measurement. However, large reflecting surfaces, such as a fence or a wall, shall not be closer than a radius of 20 m. No person, including the observer, shall ap- proach closer than 2 m to the operator. The operator’s clothing shall not be of particularly absorbing or reflecting material. The ground at the centre of the test site shall have good sound ab- sorbent properties and may comprise forest ground, grass or an equivalent surface. It should be approximately flat. The ground may be covered in snow, but not frozen over. 2 References 4.2 Enclosed space IS0 266, Acoustics - Preferred frequencies for measurements. IS0 6081, Acoustics - Noise emitted by machinery and equipment - Guidelines for the preparation of test codes of engineering grade requiring noise measurements at the operator 3 position. 1) IS0 7293, Forestry machinery - Portable chain saws - Engine performance and fuel conswmp tion. IEC Publication 225, Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations. IEC Publication 651, Sound level meters. 3 Measured quantities 3.1 The values measured shall be A-weighted sound pressure levels, in decibels, determined with the frequency weighting “A” and the time weighting “S” as defined in IEC Publication 651. 3.2 Spectral analysis is optional. When it is required, the values measured shall be octave band sound pressure levels in decibels, measured in the eight bands having centre frequencies from 63 to 8 000 Hz. Measurements may also be carried out in a large building pro- vided it can be proved that they are in accordance, to within + 1 dB, with the levels measured under the conditions given in 4.1 for one-third octave bands of noise in the frequency range 50 to 10 000 Hz. 4.3 Background noise At the microphone position, the background noise (including wind noise) measured as the A-weighted sound pressure level and in each octave band, as appropriate, shall be at least 10 dB below the sound pressure levels measured during the test. 4.4 Ambient conditions Environmental conditions (humidity, temperature, vibration, stray fields, etc.) shall be within the limits specified by the manufacturers of the measuring equipment and of the engine under test. The ambient air temperature shall be in the range from - 10 OC to + 30 OC, and the wind speed shall be less than 5 m/s. NOTE - This requirement is intended to ensure that the meteorological conditions do not prevent the attainment of the ac- curacy levels specified in 4.2 and 8.1. 1) At present at the stage of draft. SIST EN 27182:1999
IS0 71824984 (E) 5 Saw conditions and testing material Measurements shall be carried out on a normal production saw featuring standard equipment with the chain provided by the manufacturer. The engine shall be run in and warmed up before the test is commenced, the carburettor and ignition timed ac- cording to the instructions of the manufacturer, and the chain sharpened. A log or rectangular baulk of non-dried timber shall be placed on a saw horse so that its centre is 0,6 m above the ground and so that slices can be cut from it. The ratio between the width of the log, the engine power and the length of guide bar of the saw to be tested shall be as given in table 1. For guide bars longer than 05 m, the width of the log shall be Cl m less than the guide bar length. Table 1 - Corresponding values of engine displacement and length of guide bar and width of log during test Engine displacement Effective length of guide bar, L I Width of log, A I cm3 3 Care should be taken to isolate the microphone from vibrations which could affect the measurements. Care should also be exercised to avoid introducing acoustical noise (for example, noise due to the microphone rubbing against the operator’s clothing) or electrical noise (for example, due to a flexing cable) that could interfere with the measurements. 6.2 Frequency analysis Measurement of the sound frequency spectrum, if required, sh
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