A great question that typically comes up regarding binaural beats, is does the type of headphone affect the effectiveness of therapeutic audio stimulation? The short answer is yes, but don’t bother going out and purchasing the most expensive pair of headphones.
Because binaural beats are a simple sine wave with very little (no) noise, any decent pair of headphones will probably do just as well as a $400 pair. As long as the pair of headphones can produce a clean sound that isn’t “tiny” on the higher or lower frequencies, you’re good.
The more important factor is comfort. Because binaural beats are typically used for sleep and relaxation purposes, it is important that the headphones are comfortable. A pair of studio headphones with quality padding would be great or if you’re using earbuds, something that won’t irritate your ears after prolonged use would be better. Usually the cheaper the headphone, the less comfortable.
Fortunately, comfortable and decent audio quality doesn’t necessarily mean expensive.