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Re: [OM] IMG: Propeller Plane

Subject: Re: [OM] IMG: Propeller Plane
From: Donald <d1956m198d@xxxxxxxxxxxxxxxx>
Date: Fri, 05 Oct 2012 22:41:50 +0100
On 05/10/2012 21:54, Ken Norton wrote:
>
>
> Biggest problem, of course, is the horrendous noise level. Even with
> earplugs, my head hurts after a flight where I'm near the blades.
> That's mostly due to Osseotympanic bone-conduction which earplugs
> don't do anything to reduce. For me, this is also an instant migraine
> trigger. Jack hammers and other low-frequency or impact-style noises
> are rough. Ear plugs take care of sounds that come through the
> auditory canal, but most of the lower frequency sounds don't actually
> go into the ear, but instead vibrate the bone just outside the ear.
> Oversize, full-seal hearing protection (or race-car helmets) are aobut
> he only thing that can keep these sounds in control.
>
> AG
>

With me it's two-blade choppers. When I had an office at Aberdeen 
Airport (Europe's busiest heliport) I could withstand the constant S61s 
and Super Pumas, but there was a little Bell that did a couple of 
flights per day, it had me cowering under the desk. Triple-glazed 
windows were no defence. I thought my ears were going to explode.

I can tell without looking up how many blades choppers have. Ouch.

D.


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