Simon Squire wrote:
>
> Vicki,
>
> Finally I can reply... sorry for the long delay, Since my e-mail address =
changed I lost the ability to post messages!!
>
> You asked Doug about the CVX mic, and maybe I can answer this. More info =
can be found on the River Forks Research web site www.riverforks.com which =
I am still adding stuff to. The current price for a single CVX microphone i=
s Canadian $1300 or so.
>
> The current microphones are all mono, although our 180 degree version wor=
ks well in pairs, giving you stereo. In fact the biologists in Canada enjoy=
using one 360 and one 180 as a pair!!! You can find more info on how this =
works at <http://flash.lakeheadu.ca/~rrempel/CVX>
>
> The CVX has a similar gain, only from all horizontal directions, as that =
of a 24" parabolic dish. So when a bird chirps, the CVX picks it up.
How would you compare it's sensitivity to, say, a MKH 20? The MKH 20
being a omni can also pick up from 360 degrees. Also, how would it's
inherent noise compare? The panasonic capsule used is not that good
compared to a MKH 20. So how much does the design compensate for that?
Note that even with the Telinga, which is only a 20" parabolic I can
record barking treefrogs as far as a mile away. Could this mic do that?
I notice that the reference you gave they seem not to have tested the
mic at greater than 150 meter distances. I very often record at much
greater distances.
How does the stereo field compare to binaural fields?
I'm primarily staying with stereo for now, and not that interested in
mono. So am particularily interested in the stereo possibilities.
Walt
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>From Tue Mar 8 18:22:10 2005
Message: 4
Date: Wed, 24 Apr 2002 00:09:41 +0200
From: Klas Strandberg <>
Subject: Re: Directional bass
Hi!
NASA, I have been told, made a microphone which they used to pick up rumble
from fire, over 100 km away. It was a part of experiments showing that
elephants pick up such rumble and escape.
Some 30 years ago, people in Sundsvall said they could hear the water power
plant in Ume=E5, about 250 km away.
Klas.
At 14:49 2002-04-23 -0500, you wrote:
>Rich & John--
>
>I've definitely experienced grouse call seeming to come from the
>ground at my feet. Maybe it does hug the ground in some way, John.
>
>Another clue possibly: When interviewing a sight impaired person, I
>described how I sometimes feel an approaching large truck "in my
>legs" before I locate it accurately with my ears. She laughed and
>said that sub hearing vibrations are very important to sight impaired
>folks, "You can hear with your whole body, not just your ears."
>Another woman, whose hearing is impaired said she uses the low
>vibrations to feel large vehicles approaching. Triangulation with
>two legs? Golly!
>
>Rob Danielson
>
> =3D =3D =3D =3D =3D
>
>>To Rich Peet
>>
>>Low frequency sound travels really well along the ground. we can
>>speculate that "throwing the voice" like a ventriloquist, casts a
>>wider net for females or possibly deceives predators? Such as us?
>>Blue Grouse have the same characteristics and its difficult to know
>>where to point the microphone!
>>
>>John Neville
>>
>>
>>
>>
>>
>>[Non-text portions of this message have been removed]
>>
>>
>>
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>
>
>
>
>
>
>Rob Danielson
>Film Department
>University of Wisconsin-Milwaukee
>
>
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