Restful Mind (Part 3) - The Soothing Benefits of Delta Brain Waves

Restful Brain
5 min read

You've been asleep for about an hour. You've slipped beyond the realm of dreams into deep sleep.

Your body is completely still and deeply relaxed. From this place, you undergo deep restorative healing, ready to feel refreshed when you wake up.

This is your brain on Delta waves.

When delta brain waves are dominant, you’re in a state of deep restful sleep.

What are delta brain waves?

Delta Brain Waves: 1-4 Hertz

Your brain is made up of billions of neurons that use electrical signals to communicate.

When neurons fire together to send signals to other neurons, the resulting patterns are known as brain waves. Brain waves are measured by their frequency per second, or in Hertz (Hz). And there are five types of brain waves that range from very slow to very fast.

Delta waves are the slowest.

The frequency of Delta brain waves are between 0.5 and 4 Hertz. This means Delta waves peak 0.5 to 4 times per second.

Benefits of Delta brain waves include:

  • deep, restful sleep
  • healing and pain relief
  • neurological regeneration

Types of Brain Waves

Delta brain waves are just one kind of brain wave. There are five types of brain waves, each with a different frequency range and unique benefits. From slowest to fastest they are:

Brain WaveFrequencyBenefits
Delta0.5 - 4 Hzdeep, dreamless sleep
Theta4 - 8 HzREM sleep or deep calm
Alpha8 - 12 Hzcalm focus or relaxation
Beta12 - 30 Hzalert and focused
Gamma25 - 100 Hzspike during active problem solving,
information processing and learning

Delta brain waves and deep sleep

When you’re producing delta waves, you’re in a state of deep, restorative sleep. Which means delta brain waves help you to have good quality, healing sleep.

Delta waves may also be responsible for greater levels of calm. One study found that boosting delta waves helped reduce anxiety in pre-operative patients.

By boosting your delta waves, you might also experience deeper sleep, neurological regeneration and greater calm.

Can you increase delta brain waves?

Sleeping dog wearing glasses & headphones with illustration of ZZZZs above their head

Yes you can.

You can activate delta brain waves through neurofeedback - a specialised brain training program where you try to consciously induce specific brain waves.

However, an easy and effective way to increase delta waves is by listening to meditones®. Because meditones help entrain your brain.

What is delta brain wave entrainment?

Entrainment refers to the synchronisation of organisms to an external perceived rhythm. You mind and body integrate musical patterns in unison with your own biological rhythms - like tapping your foot along with the beat.

But some entrainment rhythms are more subtle. Music can entrain your heartbeat, your hormones and even your brain waves.

Both brain waves and sound waves are measured in Hertz. Which means we can use sound to stimulate or entrain specific brain wave patterns.

How do meditones entrain delta brain waves?

Meditones are precisely tuned frequencies of sound, that when heard with headphones, guide your brain into effortless calm.

Here’s how they work.

When two frequencies are combined they make a humming vibration. When you listen to this vibration with a pair of headphones, your brain synchronises to that frequency.

Which means, when you listen to a vibration of 2Hz, your brain will produce brain waves of 2Hz.

Graph of 5 seconds of Theta brain waves and their benefits

Brain waves that are at a frequency of 2Hz are in the delta range. So by listening to meditones at 2Hz, you’ll start to produce delta brain waves and sink into deep sleep. Effortlessly.

The technical term for meditones is binaural beats and their results are completely backed by science.

But all you need to remember is that they make you calm without you having to do a thing. Just listen with headphones, and the meditones effect occurs naturally and easily.

Delta brain waves and music

Side view of man lying on couch with eyes closed and headphones on holding a phone

Slower paced music is perfect for inducing a relaxed state of mind. By combining delta meditones and calming music, you can easily begin to reap the benefits of delta brain waves, such as:

  • deep sleep
  • healing & rejuvenation
  • greater calm & wellbeing

Inside the Restful app we have hours of calming meditones music for delta brain waves. You can easily filter by brain wave on the Explore page.


Electrical activity is always occurring in your brain. But delta brain waves are dominant when you are in deep, restorative sleep.

You can boost delta brain waves when you listen to meditones, which in turn will help you have deeper sleep and feel calmer.