Phantom noise popping out randomly in mic

Help for Audacity on Windows.
Forum rules
ImageThis forum is for Audacity on Windows.
Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help menu > About Audacity".


Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
Post Reply
radio_telesterion
Posts: 1
Joined: Sat May 22, 2021 10:45 pm
Operating System: Windows 10

Phantom noise popping out randomly in mic

Post by radio_telesterion » Sat May 22, 2021 10:50 pm

Hi everyone! I have an issue with my mic and audacity which I cannot fix.

Every now and then this noise appears even if the mic is muted or switched off. Sometimes it disappears, I can record wonderfully for a couple of days and then it pops out again.

It really get my noise floor CRAZY and, funny thing, you can see it just on spectre, on 5k line.

Audacity: 3.0.2, but it was doing it also on the previous version;
Mic: Røde NT1-A with shockmount, pop filter and røde boomer
arm;
Mixer: behringer xenyx QX1204USB;
System: Windows 10 on PC

Someone had this issue? I'm literally getting crazy.
Attachments
2021-05-23.png
2021-05-23.png (191.68 KiB) Viewed 48 times

Paul2
Posts: 170
Joined: Wed Sep 04, 2019 1:17 pm
Operating System: macOS 10.15 Catalina or later

Re: Phantom noise popping out randomly in mic

Post by Paul2 » Sat May 22, 2021 11:24 pm

Post the sound here, all 7 seconds of it as shown in your picture.
(Wav mono, 44.1KHz, about 1.2MB size limit I think).
Others will analyze it and try and figure it out.

It seems odd that there is about 3.2 secs of just blank "carrier", followed by about the
same period with what looks like data on it.

Are you perhaps in Europe or a country/region where mains signaling or remote meter reading is used?

https://en.wikipedia.org/wiki/Power-line_communication

Post Reply