When is noise not a hazard? Hi Tony
My initial thought is that the 85dB levels are all about protecting hearing. However, if you are working below that threshold but find it a relief when you leave the noise zone then the noise is a hazard to stress levels and may need to be treated from that perspective also. (which is way more subjective than dB readings!)
However to answer your question directly: The fact that you raise it for discussion means that it is a hazard!
So yes, include it in your risk register. It may end up ranking quite low compared to other risks, as Stuart K-K says it depends on where the lion is, but putting it on the register allows visibility to other people that it has been considered, it has been rated and that it is on the register to be reviewed whenever your review dates are.