EN ISO 11203:1995 Acoustics - Noise Emitted by Machinery and Equipment - Determination of Emission Sound Pressure Levels at a Work Station and at Other Specified Positions from the Sound Power Level
This International Standard specifies two methods for
determining the emission sound pressure levels of
machinery and equipment, at a work station and at
other specified positions nearby, by calculation from
the sound power level. The principal purpose of this
determination is to permit comparison of the performance
of different units of a given family of machinery
or equipment, under defined environmental
conditions and standardized mounting and operating
conditions. The data obtained may also be used for
the declaration and verification of emission sound
pressure levels as specified in IS0 4871.
Emission sound pressure levels are determined with
the same frequency weighting and time weighting,
or in the same frequency bands, as those for which
sound power levels have been determined.
NOTES
1 The contents of this and related International Standards
are summarized in table 1 of IS0 11200:1995.
2 At any given position in relation to a particular machine.
and for given mounting and operating conditions, the emission
sound pressure levels determined by the method of
this International Standard will in general be lower than the
directly measured sound pressure levels for the same machine
in the typical workroom where it is used. This is due
to reverberation and the contributions of other machines. A
method of calculating the sound pressure levels in the
vicinity of a machine operating alone in a workroom is given
in IS0 11690-3. Commonly observed differences are 1 dB
to 5 dB, but in extreme cases the difference may be even
greater.
EN ISO 11203:1995 history
2020EN ISO 11203:2009/A1:2020 Acoustics - Noise emitted by machinery and equipment - Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level - Amendment 1 (ISO 11203:1995/Amd 1:2020)
2009EN ISO 11203:2009 Acoustics - Noise emitted by machinery and equipment - Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level
1995EN ISO 11203:1995 Acoustics - Noise Emitted by Machinery and Equipment - Determination of Emission Sound Pressure Levels at a Work Station and at Other Specified Positions from the Sound Power Level