Muffler Upgrade (GregTech 5)

The Muffler Upgrade is a means of maintaining your sanity while in your workshop or factory. When applied to a machine, it disables that machine's sound effects. It is highly recommended that you use several of these, especially on your E-Furnaces. However, it has the disadvantage that it also disables the 'out of energy' sound effect, so if applied en masse you may need to monitor your energy supplies more carefully.

The Upgrade is applied to a machine by right-clicking the machine while holding an Upgrade. Once applied, it cannot be removed.