Just for interest, this is a recording I made with the microphone on the ro=
of of the car to test the wind shield:
http://soundcloud.com/petershute/wind-shield-test-on-car
Peter Shute
> -----Original Message-----
> From:
> On Behalf Of Peter Shute
> Sent: Tuesday, 16 October 2012 7:49 AM
> To:
> Subject: RE: [Nature Recordists] DIY suspenssion and wind
> protection for mkh 30/30
>
>
>
> > > I tried the moving car method myself, but the road and
> engine noise
> > > was so high that I wasn't sure how well the shield was working.
> >
> > Peter,
> >
> > It's best if you hang it out of a roof opening and get someone else
> > (preferably) to coast at 10 to 30 MPH. I once tracked a
> South African
> > Railways Class 25 condensing loco with an MKH 816 on a bush
> road at 90
> > MPH and got the full loco noises including the steam condenser fans
> > and a burst of the whistle from the driver.
>
> I mounted my home made SASS on the roof of the car because I
> didn't have a willing assistant, and our car is manual, so
> hand holding was out because I wouldn't be able to steer and
> change gears. I thumped on the roof each time I increased the
> speed by 10kmph, so I'd have a reference on the recording. I
> didn't have time for multiple runs, but I think next time I'd
> get it into a higher gear so the engine's quieter, and
> perhaps find a smoother road.
>
> I'll try and find the recording and post it for comment.
>
> > > By my calculations, a 1m long arm rotating at 1 rev per
> > second should
> > > simulate a wind of about 6m/second.
> >
> > Yes, if you don't fall over dizzy. :-)
>
> Good point. I was thinking of a tripod mounted, balanced arm,
> perhaps driven by rope coiled around it. It would have to be
> very well balanced to achieve 1 rev per second without it
> falling over.
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