read this.

来源: 于 2024-03-23 18:25:34 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

https://diy.stackexchange.com/questions/155652/is-3-4-osb-a-better-soundproofing-material-than-5-8-drywall

the foam blow-in does not provide much sound insulation because it is light weight.