Do you think the sound transmission is more than what you'd have with sips?
Could the sound coming through the wall be enhanced by the wall cavity? Kind of a sound enhanced chamber?
If you infill the walls, how is that going to change the performance of your vapor barrier?
What are the benefits of damp v.s. Dry blown cellulose?
Are you happy with the current insulating performance of the wall now?
Sorry for the rapid fire questions
Thanks for all the help

Rusty