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Posted by Phil Allison on 10/06/17 11:51
"Ty Ford"
> Phil Allison wrote
>
>>> 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.
>
> 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?
** Houston - we have a problem ........
> 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.
>
** Right - the issue may be down to the unnecessarily extended LF
response of the mic capsule itself, rather than any subsequent electronics.
> 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.
** Nobody ever said you could use a tie clip mic in a hurricane ...
....... Phil
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