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Posted by Ty Ford on 10/06/34 11:51
On Thu, 29 Jun 2006 04:25:26 -0400, Phil Allison wrote
(in article <4ghh3gF1ng3amU1@individual.net>):
>> When recording in a high wind environment, is it possible for the wind
>> to interfere with the radio signal, eg, reduce range or something that
>> might cause dropouts? can wind interfere with radio transmissions?
>
>
> ** Yes.
>
> Wind causes the tie mic capsule to produce large sub sonic signals.
>
> This in turn causes the limiter and / or range compressor built into the mic
> transmitter and receiver to react and drop the volume level - possibly by
> a large amount.
>
> Can sound like a drop out.
> ...... Phil
Wow! Phil and I agreeing on something! That doesn't happen very often. How
nice! Can we please keep this up or is it simply a near space anomaly?
I have had some weird effects caused by subsonic sound as Phil describes. It
was an outdoors shoot. I could hear the REALLY LOW energy on my MDR7506
phones as it pushed the limiter. Could have been the wind, although I don't
recall it being windy that day and we weren't taking typical wind hits. I was
using a Countryman B6 and a Shure FP410 automixer.
If you have it again, engage the high pass filter and see it that stops it.
In a few situations I have experienced a lot of low frequency energy pulling
down the power supply on battery powered mixers to a point where they get
wacky, especially if the headphone level is relatively high.
I had a Sound Devices 302 begin to motorboat when using a AB to Phantom
barrel adapter with the phone level jacked up. When I switched in the high
pass filter, the motorboating stopped. The explanation I was given was that
the low frequencies, barrel adapter and loud phones were pulling more current
from the power supply than it had to offer.
Regards,
Ty Ford
-- Ty Ford's equipment reviews, audio samples, rates and other audiocentric
stuff are at www.tyford.com
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