Definitely _not_ an answer (Ed specifically asked re. OSHA and
California OSHA) but:
For _Machinery_ in EU countries (and maybe some EEA countries?), the EU
Machinery Directive (89/392/EEC plus amendments) specifically requires
the manufacturer to _state_ the sound level, if it exceeds various
levels, one of which is 70dB (A).
I attach some extracts from the Directive. I think there are some
harmonized (EN) standards that address measuring techniques. Maybe there
are some product-specific stds that address additional limits?
-glyn garside
(usual disclaimer/personal opinions/etc.)
EU Machinery Directive (89/392/EEC, plus amendment 91/368/EEC), Annex 1:
1.5.8 Noise
Machinery must be so designed and constructed that risks resulting
from the emission of airborne noise are reduced to the lowest level
taking account of technical progress and the availability of means of
reducing noise, in particular at source.
1.7.4 Instructions
[...]
(f) The instructions must give the following information concerning
airborne noise emissions by the machinery, either the actual value or a
value established on the basis of measurements made on identical
machinery:
-- equivalent continuous A-weighted sound pressure level at
workstations, where this exceeds 70 dB(A); where this level does not
exceed 70 dB(A), this fact must be indicated,
-- peak C-weighted instantaneous sound pressure value at
workstations, where this exceeds 63 Pa (130 dB in relation to 20 mPa),
-- sound power level emitted by the machinery where the
equivalent continuous A-weighted sound pressure level at workstations
exceeds 85 dB(A)
In the case of very large machinery, instead of sound level, the
equivalent continuous sound pressure levels at specified positions
around the machinery may be indicated.
Where the harmonized standards are not applied, sound levels must
be measured using the most appropriate method for the machinery.
(91/368/EEC)
The manufacturer must indicate the operating conditions of the
machinery during measurement and what methods have been used for the
measurement.
Where the workstation(s) are undefined or cannot be defined, sound
pressure levels must be measured at a distance of 1 meter from the
surface of the machinery at a height of 1.60 meters from the floor or
access platform. The position and value of the maximum sound pressure
must be indicated.
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