I believe that there is a frequency at which a brain functions, they can vary depending on circadian rhythm or other factors. You can check the various effects on the brain caused by varying frequencies. Check this link -> Binaural beats. When we expose our brain to isochronic/binaural beats, it has a resonating effect on the brain, i.e. the brain starts to alter its frequency in order to synchronise with the tone. Once the specific frequency is achieved, you will have the desired effect (depending on the specific frequency you are trying to induce).
When the brain is stimulated with pulsed sounds (neuroelectrical activity via the nerves originating from the ears), the overall activity of the brain will respond to and align with these pulses. By selecting the desired rate, the brain via the frequency following response (entrainment) can be naturally induced towards the selected brainwave state.

Relaxation: There is already evidence that brainwave entrainment helps improve relaxation. In studies analyzing short-term stress and anxiety, significant improvements were noted. This has been verified by other studies that suggest brainwave entrainment enhances muscle relaxation in biofeedback and can help with pain reduction and migraine headaches. The relaxation-induced response of entrainment may be responsible for a variety of the benefits.
Chris is as good as it gets!  He is amazing with color and color correction, believe me I know!  Myself and two daughters only go to Christopher.  Stacey is top notch as well, you can't go wrong having her cut or color you.  The Salon is clean and welcoming.  His on-line booking makes life so easy and they call and remind you as well.  Can't say enough about how great this salon is!
No worries. For meditation, you should use low Theta state recordings – Theta is between 4-8Hz. To learn a bit more about this type of brainwave meditation, I recommend you read this guide that comes with two free samples: https://www.binauralbeatsmeditation.com/free-mp3/ This company also do a very good Deep Meditation recording which you can find at this link: https://www.binauralbeatsmeditation.com/product/deep-meditation/

As somewhat of a modern mystic, I have studied altered states of consciousness, but due to my monkey mind, I have only been able to experience them to a very minor degree. I have tried so many methods of meditation to little avail. But I became aware that I would not be able to progress in my spiritual life if I could not achieve at least a modicum of success in meditation.

I also suffer with migraine for the last 15 years of my life. So, when I know I am going to have a headache I will start meditating and headache suddenly subsided. What an amazing thing you have created here. This is only three weeks of my experience. How much more what I can do after…………By the way I am 49 years old. I just want to thank you so very much for sharing this amazing tape with me. It is so worth it in all aspect. I wish you all the best. How I wish that our paths will cross one day.

These guys behind this system are just brilliant, and I have seen many people confirming this, as they are loving the experience with this system. Actually, I went through a few groups and forums and found people saying they had a pretty great time. But since I’m not allowed to take screenshots of the forums, here is one I managed to get elsewhere:
An invigorating, brain-sharpening session, this audio starts at 14Hz, a beta feel-good frequency and SR harmonic. It then steps up in six-minute harmonic increments, gradually up to gamma 39Hz, leaving you feeling mentally stimulated and full of energy. A binaural beat track supports the main frequencies for those wearing headphones. Uplifting background music with embedded amplitude modulation provides a further layer of entrainment. Excellent for use as a morning alarm clock, ahead of a big night out, or to inspire those tired trips to the gym.