This National Standard of Canada is equivalent to International Standard ISo
5131:1996.

1 Scope

This International Standard specifies a method for the measurement of the noise
at the position of the operator(s) of a tractor or machine used in agriculture
and forestry. The measured noise relates only to the basic machine and applies
to self-propelled tractors and machines with either machine-carried or
pedestrian operators. The results will provide information which will enable
operators to avoid exposing themselves to noise levels which could put their
hearing at risk.

The test procedures specified in this International Standard are survey methods
as defined in ISO 2204.

This International Standard also specifies the general conditions for measuring
and reporting the noise at an operator's position on agricultural and forestry
tractors and field machines.

Additional conditions for measurements in connection with particular types of
machines are specified in annexes as follows:

Annex A - Agricultural and forestry tractors

Annex B - Self-propelled agricultural machines

Annex C - Pedestrian-controlled agricultural machines

Annex D - Forestry forwarders and skidders

The conditions specified for the operation of the machines during the
measurements are designed to provide a realistic and repeatable assessment of
the maximum noise to which an operator should be subjected when operating a
machine.

NOTE 1 Further annexes specifying, for example, additional conditions for
other types of agricultural and forestry machinery may be included in future
revisions of this International Standard.