from the good-sound-walls-make-good-neighbors dept.
disco_tracy writes "Imagine a room where a band is playing. Neighbors can't hear the music, but if someone outside the room is talking, the musicians can hear it. The concept — a kind of one-way mirror for sound — seems imaginary, but two Italian scientists recently pushed this kind of sound manipulating technology closer to reality (abstract)."
A method of solution is perfect if we can forsee from the start,
and even prove, that following that method we shall attain our aim.