Ross, that design is for two larger mics, but you're using four capsules. C=
an you please explain where you placed them on the wings, and how they're w=
ired up?=0D
=0D
Have you glued the capsules in, or are they removable?=0D
=0D
Peter Shute=0D
=0D
=0D
--------------------------=0D
Sent using BlackBerry=0D
=0D
________________________________=0D
From: =0D
To: =0D
Sent: Mon Feb 13 22:55:33 2012=0D
Subject: [Nature Recordists] Re: High tide at the Pebble Ridge, Westward Ho=
! Devon.=0D
=0D
=0D
=0D
I was asked off-list for some more info on the recording, it may be of inte=
rest to the group so I have copied my reply below.=0D
Ross=0D
=0D
Of course, ask away...=0D
=0D
The plans I followed are these from Rob D. He has designed two versions, th=
is link is to the smaller one, the one I made.=0D
https://pantherfile.uwm.edu/type/www/audio-reports/BoundaryMicExperiments/i=
mages/PBB2N-Plans_SASS-LikeDimensionsSept2010.gif=0D
=0D
If you look around on the site you will find a huge amount of information v=
ery generously supplied by Rob and other members of this group.=0D
=0D
The em172 capsules were bought from the Frogloggers site, 10x caps for abou=
t =C2=A380, excellent service.=0D
=0D
I have added a permanent wind screen around mine, (ie stetched lycra tights=
from my local pound shop) with a handful of duck down between the mics and=
screen.=0D
Without this I found the mics far too sensitive to air movement to be useab=
le outdoors.=0D
=0D
I also used a preamp BMA2=0D
http://www.micbooster.com/products/felbattpreamp.html=0D
=0D
This is not actual needed to run the capsules, they work on the low pip tha=
t the Sony M10 provides but I decided to give it a try.=0D
The preamp supplies a higher voltage to the 4x capsules I hoped the mic's p=
erformance might improve if they were being supplied something closer to th=
eir rated operating voltage.=0D
My impression is that using the pre-amp gives a fuller sound, ie more lower=
frequencies but I have not done a proper test.=0D
=0D
To make my recording I waited for a combination of things ie. high spring t=
ide, a large swell, very little wind and a day off work to get there.=0D
=0D
I had the mic array on a 2-3.0m boom which I was holding about 1.0-1.5m abo=
ve the surface.=0D
I experimented with this position to try and balance the sound of the swash=
with the sound of the surf, otherwise the roar from the surf dominated the=
overall sound.=0D
=0D
I was using the boom to get the mics far enough out so that the waves washe=
d right past me and the mics before receding, this effect is clearly heard =
as the wave passes from right to left.=0D
The mics were positioned so that right =3D towards the sea, left =3Dtowards=
the land, this is probably different to the way you had yours.=0D
=0D
I found that keeping the mic quite close to the surface and not using a lo-=
cut filter gave the best result.=0D
=0D
Hope this helps,=0D
=0D
Thanks, Ross=0D
=0D
=0D
=0D
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