what low frequencies does this headphone protect from?
can you be specific about what frequencies still get through please.
how do the optima iii (13258) headphones compare to the (71456) in terms of low frequency protection?
I am also after the highest SNR NRR DB protection.
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Asked by: Lowfrequencyprotection
Can I attach this to my hard hat?
I am wearing a hard hat I need to know if I can attach it to my hard hat.
Asked by: Adam12345
simply, no. upgrade to a new hard hat
Answered by: popeye999
Date published: 2018-06-09