Very Strange High-pitched noise on Sennheiser g3

[BAB414]

I did an interview yesterday and I had this recurring problem every 2-5 minutes or so. It was always the same: 5 quick pulses of the high noise, under his voice, but it seemed to be amplified when the speaker increased his volume, leading me to think it's a problem with the lav or the transmitter.

I'm using Sanken COS11-D's wired for Lectro, with an adapter to the Sennheiser G3's. His receiver was going into input 2 of my 552 out of the direct out line level pre-fade to input 3 of the 744t. I have never experienced this problem before, and I use these same pieces of equipment on a very regular basis. Any ideas what it could be?

sample.wav

[Marc Wielage]

For stuff like this, all you can do is punt. If it's a sitdown interview, hope that you have a wired adapter and can just hardwire it in the mixer. What happens if you try a different microphone?

If the signal is being driven into oscillation, there could be all kinds of potential causes, everything from mike to transmitter to receiver, even localized interference.

[Eric Toline]

You guys really hear something under the voice? Sounds fine to me.

Eric

[studiomprd]

" Any ideas what it could be? "

interference.

CRAP happens

[Crussell]

I hear it, it's right at 4.75k, and maybe something at 3.18k. If you drop the file into something with a spectral display, it's right there. It's really subtle and should be easy to fix.

As far as the cause, I dunno. Sounds like RF nastiness to me. If I were getting the files to post, I'd thank you, they sound much better than the stuff I've been "fixing" all day.