Researchers harness ultrasound to create isolated pockets of sound only you can hear in a crowd

Specialized equipment, like parametric array loudspeakers, can direct sound vibrations to a specific point in a focused beam. However, those in the beam's path can still hear the transmission. Limiting the sound to only the targeted location is still impossible using current technology.

Doesn't sound like this is viable for listening to music without distrubing others. Does seem viable for audio advertisements like in Minority Report.