After the disastrous first turn on of the Compressor, I started modifying the Box to make it quieter.
Started by making a material covered Polystyrene block to sit between the Box and Toilet block to cut down vibrations.
Then mounted the Air Receiver on Pneumatic Tyres instead of Rubber Blocks to reduce the resonance.
Followed by lining the Box Floor with a layer of Polystyrene.
The entire inside was then covered in Profile Foam.
Hooked up a 3 Phase Switch.
And added the Top, which was covered with Profile Foam once installed.
With my untrained ears, These methods probably dropped the Noise from 100-db to around 60-db.