At my office, the building makes lots of settling noises, which can be quite annoying.
On Friday, I came up with a little experiment: for one hour, keep tally marks of every time the building makes a settling noise, and categorize it as either:
painful - Loud enough to cause physical pain as my body reacts
Loud - High enough volume to startle me
Medium - Clearly audible and somewhat distracting
Quiet - Audible but not an issue
I stopped after 25 minutes because I was running out of room on the post-it note. Here were the results:
Painful 3
Loud 5
Medium 25
Quiet 28
There is also loud constant noise from the air system and the huge number of computers that the office has.
I have some in-ear earphones (which they do allow), but my ears are having difficulty with having the pieces inside my ears (uncomfortable, build up of dry dead skin cells). Real earplugs aren't an option (since people need to talk to me sometimes), and my ears begin to suffer from fatigue if I have any kind of music going all day (I can only handle an hour or two at a time), and the earphones only take the edge off of the noise while the volume is off.