The complexity of sound transmission

From Energy Vanguard, Soundproofing a Wall - The Basics

Sound is a wave. Unlike light or magnetism, this kind of wave needs physical matter, a medium, through which to travel. That property of sound waves, of course, led to the brilliant tagline for the 1979 movie, Alien: “In space, no one can hear you scream.” There’s nothing to vibrate and carry the sound waves in space; hence, no sound transmission.

So, the best way to reduce sound transmission would be to live in a vacuum. You’d have a short life but you wouldn’t be bothered by noise. In addition to being dead, you’d also be broke because turning your house into a vacuum chamber wouldn’t be cheap. Therefore, I’m going to take a leap and assume the vacuum technique won’t work for you.

So a bunch of actually useful information follows this.