Finally Going to Tackle the Interior - Day 0

Thanks for the great read Mike & I can't wait to see the before & after
shots.
On the subject of insulation, does anyone know what effect "Acoustic
Insulation" as used in house walls to suppress noise, would have if used in
the side walls of the Cockpit & firewall? Or does the majority of the noise
still come through the Perspex windows & windscreen? Or exhaust noise from
the floor?
This question is mainly in relation to a PA28

Thanks from Down Under
Steve