pressure levels at the work station and sound power
levels.
For machines where Annex A of ISO 7960:1995 is not
applicable, e.g. for different spindle speeds and saw blade
diameters, the detailed operating conditions used shall be
given in the test report.
Emission sound power levels of circular saw benches
except building site saws shall be measured in
accordance with the enveloping surface measuring
method given in EN ISO 3746:2010 with the following
modifications:
a) environmental indicator K2A shall be equal to or less
than 4 dB;
b) difference between the background sound pressure
level and the machine sound pressure level at each
measuring point shall be equal to or greater than 6 dB.
The correction formula for this difference is given in
8.3.3 Formula 12 of EN ISO 3746:2010, 8.3.3;
c) only the parallelepiped measurement surface shall be
used at 1 m from the reference surface;
d) where the distance from the machine to an auxiliary
unit is less than 2 m the auxiliary unit shall be included
in the reference surface;
e) accuracy of the test method shall be better than 3 dB;
f) number of microphone positions shall be nine in
accordance with Annex A of ISO 7960:1995.
Alternatively, where the facilities exist and the
measurement method applies to the machine type,
emission sound power levels may also be measured in
accordance with a method with higher precision i.e. EN
ISO 3743-1:2010, EN ISO 3743-2:2009, EN ISO
3744:2010 and EN ISO 3745:2012 without the preceding
modifications.
For determination of sound power level by sound intensity
method, use EN ISO 9614-1:2009 (subject to agreement
between the supplier and the purchaser).
Emission sound pressure levels at the workstation shall
be measured in accordance with EN ISO 11202:2010 with
the following modifications:
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