I concur. I have also noticed over the years that the GSM phones are the
culprits. Like you, I find CDMA doesn't usually present the same problems.
The EMF from GSM phones seems to find its way into all kinds of lines. I've
even seen the display on a CRT completely collapse as the GSM cell phone
sitting next to it rings.

What worries me is that even next to some fairly low impedance audio lines,
I've had pretty horrendous noises come buzzing out of my monitors. Even
when the phone is being used on a call (not ringing), the buzz radiates into
even low impedance circuits.

Makes me wonder how bad those things really do fry your brain!

Bill Ruys.

"JL" wrote in message
news
"WillStG" wrote in message
...
OK, this is weirdness. When some new cell phones ring (with the
ringer
muted) they emit an electronic pulse that has been causing a extremely
loud
electronic BAZAAAAP! noise in my Sennheiser Lavalier mics. I have been
wondering on occasion lately, "Hey what the hell was that?", and now I
have
found that the ridiculous electronic noise is invariably accompanied by a
muted
cell phone going off.

I've found in my experience that it's the GSM type cell phones (ATT,
TMobile, etc.) whose frequency somehow gets into audio equipment. CDMA (as
in my Verizon cell phone) doesn't. Perhaps there's a technical explanation
related to the frequencies at which these services operate. I've been
warning people about it for a couple of years now after someone with a
cell
phone ruined a take in a session, and this person was in the control room,
not in front of a mic.

Also, I think it doesn't have to do with it being muted. It happens when
it's on and it's ringing or about to, as far as I've seen.



JLRevelo
www.jlrevelo.com