What is binaural beats? Why should you use it?

Binaural beats are a fascinating and exciting technology that harnesses the brain’s responsiveness to sound to move you into a state of deep relaxation, relieve anxiety, and help you sleep better.

What are binaural beats?

Sounds like a new music genre, right? Not exactly. Binaural beats are a technique of combining two slightly different sound frequencies to create the perception of a single new frequency tone.

The theory is that when exposed to two different frequencies at the same time, one in each ear, the brain actually perceives a single tone that is the difference between the two separate frequencies. Your brain, in a sense, “tunes” to this new frequency.

You listen to binaural beats using headphones. In each ear, you receive sound at a slightly different frequency (often accompanied by some relaxing background sounds). If your left ear receives a 300-hertz tone and your right ear receives a 280-hertz tone, your brain will process and absorb a 10-hertz tone. That’s a very low-frequency soundwave—one you can’t actually hear. But you don’t need to hear the sound for your brain to be affected by it.

Why is exposure to these soundwaves helpful to sleep and relaxation? Science shows that exposure to binaural beats can create changes in the brain’s degree of arousal. Listening to these sounds that create a low-frequency tone, research indicates, triggers a slow-down to brainwave activity—and that may help you relax, lower your anxiety, and make it easier for you to fall asleep and sleep more soundly.

How brain waves work

To understand how binaural beats may help relaxation, mood, mental performance, and sleep, you need to know a little bit about brain waves and what they indicate about our state of consciousness, emotion, and mental activity. Brainwaves are created from the pulses of electrical activity our neurons exhibit as they communicate with each other. Our thoughts, feelings, and actions are all expressed through this constant neural communication—so our brainwaves are associated with how we feel and what we can do at any given moment.

How binaural beats might improve sleep

Brainwave activity during sleep is largely distinct from brain activity when you’re awake. (REM sleep is an exception: During REM, your brain is active in ways very much like when you’re awake.) During non-REM sleep, the slower, lower frequency theta and delta waves dominate, compared to the alpha and beta waves that are prominent when you’re alert and active.

A therapy ( that slows brainwave activity, helping to produce low-frequency waves, is likely to aid relaxation and sleep. But it’s not only lowering brainwave frequency that binaural beats may offer to sleep and relaxation. A small study (19 people) has found that exposure to binaural beats is associated with changes to three hormones ( important to sleep and well-being:

• DHEA. DHEA functions as a kind of master hormone ( helping to produce other hormones in the body on an as-needed basis. DHEA is critical to immune function and disease protection. Particularly significant for sleep is that DHEA works to suppress cortisol, a hormone that stimulates alertness and provokes stress at elevated levels. The study found that 68 percent of participants had increases to DHEA after using binaural beats.
• Cortisol.Cortisol is an arousal hormone, stimulating alertness and attention. Cortisol levels rise and fall in connection to circadian rhythms—cortisol levels rise to their peak levels first thing in the morning, just in time for you to be active for the day. Too-high cortisol levels are associated with insomnia ( as well as more time spent in light sleep, rather than deep sleep. The study found that 70 percent of participants experienced a reduction in cortisol after exposure to binaural beats.
• Melatonin. Melatonin promotes and regulates sleep. Melatonin levels rise dramatically in the evening, and the hormone works to relax your body and mind, preparing you to fall asleep. The study found 73 percent of participants had higher levels of melatonin after using binaural beats. The average increase was more than 97 percent.

In addition to potentially boosting sleep-promoting hormones, binaural beats may also reduce our perceptions of pain. A 2017 study found that binaural beats used in combination with visual stimulation led to reductions in patients’ perception of acute pain. Other recent research showed binaural beats helped improve pain perception in patients with chronic pain

This is good news on its own—and also promising news for sleep. Pain often interferes with sleep (and poor sleep can make pain worse), so reducing pain is one effective way to improve sleep.

Binaural beats for anxiety reduction

A growing body of research suggests that binaural beats can reduce different forms of anxiety, from mild to chronic. One especially interesting study looked at the effects of binaural beats on anxiety among patients preparing to undergo surgery—a life circumstance that is pretty anxiety provoking for most anyone. Over a period of six months, patients spent 30 minutes on the day of their surgery listening to binaural beats. Compared to patients who listened to a soundtrack that did not include binaural beats—and patients who received no “beats” therapy at all—the binaural beat listeners experienced significantly greater reductions in anxiety levels.

Another study looked at whether binaural beats helped anxiety in patients preparing for cataract surgery, and found that binaural beats led to reduced anxiety levels and lower blood pressure levels before surgery.

Binaural beats to enhance cognition and creativity

• Scientists are also looking at how binaural beats affect cognitive abilities, and whether this is a therapy that can be used to enhance cognitive functions such as learning, memory, focus, and creativity. Here’s some of what we know:
• Research suggests that binaural beats can help working memory and long-term memory ( and also strengthen connections among networks within the brain.
• Attention may also be improved by using binaural beats. Studies have shown that binaural beats may affect levels of dopamine ( a hormone that plays a broad role in cognition and a particular role in creative thinking. This has scientists examining the possibility that binaural beats can be used to stimulate creativity. (If you’re looking to be more creative and innovative in your thinking, keep in mind that sleep itself is a powerful tool.)

A few important notes

Some studies have found that binaural beats can affect cognitive function positively or negatively, depending on the specific frequency generated. For example, a study of long-term memory found that beta-frequency binaural beats improved memory, while theta-frequency binaural beats interfered with memory. This is something for scientists to continue to examine closely. For people who use binaural beats, it’s important to understand that different frequencies will produce different effects.

When studying the impact of binaural beats on cognition, researchers often find that individual differences matter in whether the therapy delivers a benefit. Right now, it looks as though at least some of the benefits of binaural beats may work for some people, and not for others.

Research into binaural beats is expanding, but it’s still early. We’ve got a lot more to learn about how this technique affects brain function and the ways we might use it most effectively. That goes for cognitive enhancement, as well as for sleep, relaxation, and mood.

There is a lot to like about this technology as a potential treatment for sleep problems. It’s low impact and non-invasive, it doesn’t rely on chemical drugs ( it’s inexpensive, and, for most people, likely easy to adopt and maintain. In this way, it’s similar to other behavioral therapies for sleep that I like, including meditation and relaxation techniques, and other mind-body therapies.