If The rationale with the sound transmission is to do together with your doorway by itself, think about upgrading to stable-core doorways. They are more practical at blocking audio when compared with hollow-Main doorways. In case you are looking at this, you may look into our guideline for simply how https://rowanbxnds.blogzet.com/the-fact-about-soundproofing-that-no-one-is-suggesting-49483741