Your brain hums with electrical activity every moment of your life

To produce even the most trifling thought, Millions of neurons must fire in harmony.

Your electrical brain waves operate at different speeds or frequencies which we measure in cycles per second or Hertz – named after the scientist.

Amplitude is the strength or power of the electrical impulse – Which we measure in microvolts because the thick bony skull obstructs most of the measurable activity.
The entire brain doesn’t pulse in time to one particular speed or frequency, Encephalograms show that at any given time, the electrical patterns that your brain produce are made up from distinct wave forms ranging from 0.5 Hz or cycle per second up to 30 or more Hz.
There are always predominant brain-wave frequencies where most of these waves synchronise. Scientists measuring brain waves discovered they were related to mind states.
Brain Waves are divided into four predominant speed ranges, or frequencies that relate to mind and body states. Firstly there’s Beta, then Alpha, Theta and Delta
Brain-wave entrainment is simply the tendency for two Fluctuating brain waves to lock together.
Your brain is constantly being stimulated, and your neurons constantly fire, responding to that stimulation, such as responding to the beat of music being listened to.
Once your brain responds to a stimulation frequency for around 5-6 minutes continuously, it begins to synchronise and harmonise by generating that same frequency spontaneously.

In this way, you can deliberately modify and enhance preferred brain-wave states according to your specific needs.
When you’re in beta state (normal waking consciousness), 
Beta brainwaves makes up the strongest signal . Beta is in the higher speed or frequency range and is associated with alertness
Your brain usually produces beta waves; when you think logically, make decisions and problem-solve.
Beta waves help you to consciously function and focus on the outside world and they increase in signal strength with stress. 
the greater the stress, the higher the frequency.

This frequency range is associated with the often-described “fight/flight” mode and consequently the release of cortisol, which, over time, weakens the Immune system.

This explains why excess stress and associated high beta brain wave activity is detrimental to our health. Beta waves reduce with muscular activity, which is one reason why sport is good for the mind – as well as the body.

Beta operates between low-Beta; that is 13 to 18 hertz – also known as SMR or sensory motor rhythm and high Beta- running at 18 to 30 cycles or waves per second.

Alpha brain waves are present during relaxation, daydreaming, imagination and visualisation.

Alpha is the bridge between Beta, Theta and Delta or between the conscious and subliminal mind.

Alpha waves bridge your dream state to your waking state helping you to remember them. A weak alpha signal diminishes the link to your subliminal creative mind. Alpha waves operate between 8 and 12 (Hz)
Theta brain waves are active during REM, deep meditation, and insight experience. They represent the twilight zone – between consciousness and drifting to sleep 
Theta waves constitute the classic “Altered State”. and gateway to the subliminal mind.

Your memories, emotions, creativity, attitudes, beliefs, and behaviours originate in the theta frequency storehouse.

Theta waves operate between 4.5 and 7.5 (Hz)
During deep dreamless sleep, and when your other brain-waves diminish, delta continues to provide you with regenerative sleep 
Delta brain-waves represent the unconscious mind and may be likened to your personal radar sending, seeking and receiving instinctive messages and creating empathy. Delta signals operate between .5 or half a hertz and 4 (Hz).
The combination of these brainwave frequencies underlies your state of consciousness at any given time.We have a finely woven, intricate interrelationship of brain-wave frequencies that delicately determines our states of consciousness.

The optimum brain-wave pattern for high performance creativity, insight and healing, is an intermix of all your different brain waves simultaneously:
Beta waves are produced when we mentally process consciously and help you focus your attention on the outside world
Alpha waves are produced when we relax and detach from stress and act as a bridge between the Beta state and deeper brainwave states, enabling access to our memory storehouse.

This alpha bridging process occurs in altered states such as meditation, hypnosis and envisioneering.
We produce Theta waves during REM, and when we are inventive and during inspiration, insight, and states of heightened spiritual awareness
We produce Delta waves during deep sleep and also when we are awake they can act as our intuitive, empathetic radar
Your brain waves combine to create your experiences.

No one brain-wave level is better than any other; all your brain-waves work together to form your own brain-wave signature, creating your repertoire of mental, emotional, and spiritual states.