Microphone picking up background noise

[NicolausM]

Hello people i just bought about 10 hours a go the Blue Yeti Pro mic
i already one a semi pro named : Sony ECM MS907 i believed it was the problem but the new one behaves the same.

it has a very annoying noises in the background, i have modified all the settings has it says on microsoft page and on pro youtube'ers.
The noise is still there i don't know what to do...sounds like something interfering,
I've done this : i mute the microphone and start recording the background noise is still there,
i mute the microphone to see if it records nothing and it doesn't record nothing
the microphone level still fluctuates with microphone button off.

I have made a sample here :
http/vocaroo.com/i/s034QQOLdm2Z

please a bit of help i don't what to buy another microphone ,i paid for this one 150 $...

All the best.

 

[justcallmetom13]

Try investing soundproofing walls!
http/www.amazon.com/Auralex-MudGuard-Isolator-Dampening-Charcoal/dp/B004VM5R7Y/ref=sr_1_5?ie=UTF8&qid=1396158960&sr=8-5&keywords=soundproof+wall

 

[jFiveNYC]

Try investing soundproofing walls!

OP states the noise is recorded while the mic muted. Investing in "soundproofing" is a good idea, but it can become very expensive. Acoustical treatments will not help solve a noise issue concerning electrical issues.

What are you using to record the audio signal, a computer? Could you detail your signal flow from microphone to computer?