Effective soundproofing is tricky. I had to wade through a lot of conflicting advice when I did it. I suspect a big factor is that most people do only a handf

Effective soundproofing is tricky. I had to wade through a lot of conflicting advice when I did it. I suspect a big factor is that most people do only a handful of implementations, and might overgeneralize the lessons they draw. Also, for a given structure and environment, most people can only afford to try 1-2 soundproofing approaches (wall structure, ventilation, etc.) So it's hard to know if they picked a good point in the tradeoffs space.