EPFL researchers have developed a 100% effective, ultra-thin active noise cancelling system that uses an ionized air plasma propulsion system instead of speakers. A 17mm (0.6 inch) thick layer can block 20 Hz noise as well as a 4m (13 ft) thick wall.
What part of living in a country where producing a bottle of Insulin costs about $4 and a month supply for a patient is about $3,000 a month caused you to think that?