Question: what is the difference between binaural beats and isochronic tones?
Answer: Whereas binaural beats utilize two tones (one played into each ear), isochronic tones use just one tone. This one tone repeatedly turns on and off in a pattern (more like pulsating), with the speed depending on the frequency(s) used. This may seem like a minor distinction, but it means that you don't need headphones.