Before & After Insulating My Garage - Sound Proofing Results. Plus Insulating The Internal Walls

In this video I compare the sound levels before and after adding insulation to my garage.  I added an insulated ceiling, build a stud wall in front of the roller garage door, and in this video I also frame and insulate the internal walls in an attempt at sound proofing treatment to stop noise coming in from the nearby busy road and limit the sound of my machines for the sake of my neighbours.  Plus it should be more thermally efficient - keeping the warm air inside in the winter months and the cool air inside in the summer months.