A Spanish sound engineer has developed a new sound management system that is able to boost volume without increasing sound pressure, meaning that it would be possible to blast music and sound without it affecting neighbouring buildings.

…

The system works by changing the brain’s perception of how loud the music being played so that the brain thinks that the same sound wave is twice as loud, while keeping the actual sound pressure, measured in A-weighted decibels (dBA), at the same levels.

«Psychoacoustic sound: Finally you can play music at top volume and the neighbours won’t complain», Mary-Ann Russon, International Business Times.