Ewan Whoesarmy:
In answer to your question, like Hoverboy, I too wore a helmet for many years (primarily in the Military, where the risk and exposure level was much higher than what I do now).
I stopped wearing my helmet when I came offshore, but I agree that the noise attenuation of a helmet far exceeds the capabilities of the 'David Farce'.
Besides, if you read some the responses to my posts, it seems I am so thick, that I don't need one!
Cheers, OffshoreIgor