If you're sensitive to office noise I strongly suggest getting good noise cancelling headphones. I had the same problem about a year ago, bought bose qc 25 and

If you're sensitive to office noise I strongly suggest getting good noise cancelling headphones. I had the same problem about a year ago, bought bose qc 25 and while a bit expensive it think it's money well spent, I'm much less aware of/annoyed by the noises around me