Whilst treadmills may make a slight sound, ideally, you want a treadmill that has a relatively silent motor. After all, you don’t want to be disturbing the rest of your household or your neighbors. Depending on the construction of your building, if noise carries easily and you want to work out at midnight or on Sundays, your neighbors will not be impressed.Also, look into buying protection mats to protect your floor. You could also consider using an old carpet under the treadmill, which can cushion the treadmill noise vibration.