This is the justification behind such inventions as the Dreamachine and binaural beats.

Some people use binaural beats to help them sleep, meditate or have Out of Body Experiences.

There are computer programs and iPhone programs that make binaural beats.

Scientific research into binaural beats is very limited.

Monroe's concept was based on an earlier hypothesis known as binaural beats and has since been expanded upon a commercial basis by the self-help industry.

The press release also names Music Played On as the first known contemporary album to intentionally use binaural beats.

Another way to induce spiritual experience through an altered state of consciousness involves psychoacoustics, binaural beats, or light-and-sound stimulation.

A phenomenon similar to missing time can occur while listening to binaural beats designed to produce altered states of consciousness.

At that time, binaural beats were considered to be a special case of monaural beats.

However binaural beats can be heard when the tones have different amplitudes.