My invention would utilise the principle of noise cancellation directed in three dimensions, so that the desired effect would be directed at a specific location.

A single audio wave would be inaudible by itself, however, standing in the specified area where the audio waves are combined would allow you to hear the audio. In a “movie area” any surrounding noise would be cancelled and people could enjoy only the sound from the movie.

An “area of silence” where all surrounding noise is cancelled would allow you to read a book in complete silence while people are talking loudly around you.