Due to a popular request, I have decided to upload the original audio files to my website. This allows anybody to download the original WAV file used in each video before it's compressed. These are large files, and it costs money to host them on a server, so they are being sold for less than the price of a cup of coffee. If you're interested in downloading this specific audio file, and want to support me while you're at it, you can find it here: www.anthonysommer.com/store Headphones are recommended. Depending on your audio device, you may need to turn your volume up higher than normal. Please take the time to adjust your volume to a low and comfortable level.
Neural entrainment is the theory that our brains have a tendency to synchronize themselves to external stimulation, which could include auditory, visual, tactile or electromagnetic stimuli.
Auditory entrainment occurs because of the interaction of sound in the inferior colliculus, and the superior olivary complexes. Auditory information from each ear is integrated, and precipitates electrical impulses along neural pathways through the reticular formation, to the thalamus, auditory cortex, and throughout the brain.
The human brain contains approximately 80+ billion neurons which communicate with each other to form our thoughts, emotions and behavior. When our neurons communicate in mass, it produces a synchronized electrical pulse known as a brainwave. Our brainwaves can align with an external stimuli, and as a result we can stimulate our brains in ways that could positively effect our psychology and physiology. This is an effective method which allows you to experience what these states feel like, and how they affect the body.
There are five primary brain wave ranges. They are known as Delta, Theta, Alpha, Beta, and Gamma waves. Alpha waves are faster than Theta and Delta waves, and range between 8 - 12 Hz. We experience these waves in wakefulness or in meditative states. It is a resting state for the brain and aids mental coordination and the learning process. Many report this as an especially pleasurable state of mind.
Potential benefits of Alpha waves:
- Stimulates the imagination, and may help facilitate creative expression
- Increase concentration and motivation
- Improves discernment and problem solving
- Improves learning capabilities and memory
- Presence of mind (living in the moment)
- Reduces stress hormones, and as a result it may help to relieve anxiety and depression symptoms
Entrainment is an effective method which allows you to experience what these states feel like, and how they affect the body.
Auditory entrainment typically occurs from four forms of stimuli, known as binaural, isochronic, monaural audio, and noise.
- Binaural stimulation requires the output from a left and right audio source, and the input from both ears. The two inputs combine and create a pulse modulation wave. This wave is internal, and is generated within the brain. This effect is a consequence of the interaction of different perceptions. The comparative difference in each frequency combination creates a phase difference.
- Monaural stimulation is commonly a sine, or square wave resonating from a mono audio source. It can be experienced without the need for two auditory inputs or outputs. When two waves of slightly different frequency are combined, the resulting wave varies in amplitude and modulation. The variations would be perceived acoustically as modulations in loudness.
- Isochronic stimulation is a wave which is modified with pulse modulation. In simplest terms, it is a tone which is being turned on and off rhythmically. Isochronic audio has some characteristics, such as fade time, pulse width, and wave depth. These variables can be adjusted to alter the shape and sound of the waveform.
- Noise can also be used as a sound barrier. The brain uses noise to tune out any background sounds lower than it's amplitude. It also seems to help the brain comfortably 'tune out' from it's auditory stimuli. When a user listens to noise their brain cannot clearly process all of the sound frequencies being heard, so it will zone out naturally because it is overwhelming to even attempt.
Carrier frequency: 20 Hz
Pulse modulation frequency: 9.6 Hz

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