There are two general types of brainwave entrainment frequencies available in the market today: Binaural Beats and Pulsed Tones (known as Isochronic tones).
Binaural beats have been around for a long time, but they are being replaced by pulsed (isochronic) tones for numerous reasons, of which the main two are:
1) Binaural beats often require expensive headphones for maximum benefits. Pulsed tones do not. In fact, isochronic tones often do not require any headphones at all.
2) Binaural beats tend to stop working for a person after a while, so they are required to purchase new tracks with deeper binaural entrainment frequencies. Pulsed tones don’t stop working in this way, and they actually work better the more one uses them.
This is because binaural beats send two different frequencies at barely-audible volume levels into each ear. It is then up to your brain to “do the math” and entrain to the difference of the two frequencies. For example, one ear receives a tone at 200hz, and the other ear receives a tone at 210hz. Your brain will then (theoretically) entrain to a 10hz rhythm, which corresponds to a deeply relaxed Alpha state.
The problem is that over time your brain gets used to processing the two tones and stops entraining to the difference. This is why most binaural beat brain entrainment products have several levels to keep your brain progressing as it adapts to the frequencies.
Isochronic tones, on the other hand, present the brain with a computer generated, audible rhythmic tone that the brain will easily follow. The brain’s natural tendency to follow, or entrain to, rhythmic tones allow isochronic tones to create a powerful, consistent state of entrainment that does not “wear off” over time.
Because binaural beats are normally “masked” or hidden inside of background music, special headphones are required in order to correctly reproduce the frequency range of the binaural tone. This is one of the biggest weaknesses of binaural beats.
In contrast, the audible isochronic rhythms generate an almost “irresistible” entrainment effect that does not need any special headphones to work. The main thing you should remember here is that rhythm is one of the most basic functions in the human brain, so everyone’s brain responds to audible rhythm, including yours.
Isochronic tones are extremely effective at entraining the brain to any frequency from a deep meditative state, to mild relaxation, to high level stimulation that can literally exercise the brain’s ability to produce more neural-synaptic connections, which results in increased intelligence in the user.
The pulsed tones must be audible for these effects to occur, and consistent use of isochronic tones will literally train your brain to move into the entrainment state as soon as you hear the tones.
Brainwave entrainment can help you increase intelligence, relieve stress, meditate easily, increase concentration and memory, and much more. The only way to get these benefits is to experience entrainment for yourself.