Angel g
The listed driver ear Db reading for this machine is 76.5Db. This is with no cab fitted just the standard overhead guard. Any cab that you may have fitted will trap and amplify the sound to increase the reading. You should also check for increased mechanical noise from the pump drive shaft, engine and overhead guard mounts etc. It also may be worth checking that you Db meter is reading correctly as these machines are not that noisy in normal circumstances. Your reading of 83-84 is roughly 5 or 6 times louder than the stated reading for this machine (which is a lot).