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8. APPENDIX C: Dosimeter Module for the assessment of noise
at workplace
The dosimeter module for the assessment of noise at workplace of the SC-30 adds a new
measurement mode that is perfect for the application of the Directive 2003/10/CE which
adapts to the technical progress the regulation on protection of the health and safety of
workers against the risks regarding the exposure to noise. In The Member States, the
corresponding transposition to national law.
This dosimeter module allows you to simultaneously measure all parameters needed to
assess the levels of noise to which workers are exposed when wearing or not hearing
protectors (SNR, HML and Octaves).
The SC-30 measures simultaneously the equivalent level with frequency weighting A and C [
L
At
, L
Ct
], daily noise exposure level [ L
EX,8h
] (ISO 1999), Noise exposure in Pa
2
h [ E ] and
noise dose [ DOSE ] referred to a programmable Criterion Level [ L
C
], and, of course, also
the Peak Level with frequency weighting C [L
Cpeak
] (ISO 1999).
Moreover, the SC-30 allow you to carry out the measurement during a time shorter than the
exposition time, because it shows on the screen all parameters projected to the expected
exposition time (programmable projection time [ t
p
] ).
To evaluate the exposure to noise taking into account the attenuation of the individual
hearing protectors worn by the worker, the SC-30, beside measuring the equivalent level with
frequency weighting A and C [ L
At
, L
Ct
] (SNR and HML method), simultaneously carries out a
real time frequency analysis with frequency weighting A and by octave bands from 63 Hz to 8
kHz (Octave method).
The huge memory of the SC-30 allows you to store the time history of the measured
parameters (time periods longer than a week), and afterwards recalculating them for any
desired time interval.
The SC-30 helps you to asses and measure the exposure to noise and also brings you all
data needed to inform and train about the significance and potential risks of the results of the
assessment and measurement.
Moreover, It helps you to design and run a reduction programme and to choose the suitable
hearing protectors.
The SC-30 is a type 1 integrating sound level meter conforming to EN 60804 and EN 61672,
so it is the perfect instrument to carry out measurements with the worker being present or
not. And because of being a Type 1 instrument, the metrological inaccuracies due to the
instrument are negligible (ISO 9612).
The dosimeter module for the assessment of noise at workplace is not included with the SC-
30. It is an optional module and it can be acquired when buying the SC-30 or later. To
incorporate it, you just have to contact your official
distributor and supply him
the serial number of your sound level meter and manage the transaction. In a few days you
will receive a CD with the activation program.
8.1 Dosimeter module activation
NOTE: Once a module has been activated, it cannot be deactivated.
To activate the Dosimeter Module (DS), follow the next steps: