Should I Put Insulation To My Home Subwoofer Whats The Best Way To Put In Insulation In My Old House?

Whats the best way to put in insulation in my old house? - should i put insulation to my home subwoofer

I have an old house with confinement from 0 to 85 years. It has plastered walls and a part of the house has a high cieling. I wanted to blow in insulation, at least in the ceiling. Each "Been there done that"?