This auditory illusion is called a binaural beat. For example, if a person hears a tone of 405 Hz in one ear and a tone of 415 Hz in the other, they would be hearing a binaural beat with a ...

meaning that 22.2 sound could be reproduced using fewer loudspeakers. This article gives an overview of binaural reproduction and reports on methods for estimating the head-related transfer ...

Although there are no reported safety concerns regarding binaural beats, their effectiveness is still heavily debated. Some research suggests the reported benefits are placebo effects, meaning ...