Hi
I have googled!! and come up without the answer I need.
The noise regs categories change in 2006, anyone know what a category 4 was before this time?
I have a document which says someone has to have a hearing standard of cat 4...and given it is for a safety critical role, I need to either challenge a typo or find out what cat 4 was previously ...any ideas anyone?
Jacqui
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