Impractical with multipath. You would have better luck targeting people to not hear any sound than you would making it silent everywhere but one location. Unl

Impractical with multipath. You would have better luck targeting people to not hear any sound than you would making it silent everywhere but one location. Unless you turned all walls into speakers, which would be a fun hobby project. You could also skip all of these issues if you really want Hi-Fi and just used sealed IEMs.