Odd Tones in Certain Environments

I have some HL from ~1200 to 1560Hz in my right ear. My tinnitus is at 1560Hz and I've had it for about a year. Just 2 days ago I started getting this 1180Hz tone in my ear at work. Appears to have to do with the noise of the HVAC system. It isn't real because my good ear doesn't hear it and when I go into another room it isn't there, just the usualy 1560Hz tinnitus. My desk fan doesn't even help to mask it.

What could this be?

 

I thought this was happening to me too. Turns out I was developing a new tone. Might be a sign you should take it easy.

 

I have been. I've been wearing ear dial plugs to athletic games. Anything over 85dB the plugs or the earmuffs go on. I don't hear this "new tone" when I put the earmuffs on.

 

Hmm... I just figured out I'm Diplacusis at that frequency. To match the tones the "bad" ear needs the frequency to be 20Hz higher.

 

The fan doesn't even mask it. It actually seems to just get louder with more white noise. If I go in a quiet room its gone. Any ideas?

 

This would happen to me where sometimes I preferred being in a silent room. I just try not to think about it and some days are better than others. Still learning but your T sounds very similar to mine.