Binaural Beat ( Introduction )

What Are Binaural Beat ? 

Here's the knowledge base about binaural beat, cause to many question comes about the different of brain wave technology likes binaural beat, monaural beat and isochronic tone, so we gives you this knowledge base about all the things of Brainwave entertainment technology.

what are binaural beat ?

‘Binaural Beats’ is a term given to a measured change in brain activity when presented with audio stimulus. When a person is presented with a stereo sound with two different tones – the brain produces a response (binaural beat) which is hearing and responding to the difference between the tones, not the actual tones themselves.

Binaural beats are auditory brain-stem responses which originate in the superior olivary nucleus of each brain hemisphere. They result from two different auditory impulses or sounds, heard from opposite ears. This binaural beat is consciously heard as the human hearing range is from 20-20,000 Hz. Rather it is perceived as an auditory beat and theoretically is being used coach certain brain rhythms from what is called the frequency-following response (the tendency for the brain to resonate at the frequency of an external stimulus).

How Binaural Beat Works On The Brain

When signals of two different frequencies (sounds) are presented, one to each ear, the brain detects phase differences between these signals. The brain processes this anomalous information differently when these phase differences are heard with stereo headphones or speakers. A perceptual integration of the two signals in perceived in the brain, producing the sensation of a third “beat”. The difference between the signals waxes and wanes (this is the “wavy” sound heard in the hypnotic sessions) as the two stereo sounds mesh in and out of phase. The binaural beat is perceived as a fluctuating rhythm at the frequency of the difference between the two auditory inputs.

Binaural Beat Can Create Hypnotic Response

Binaural beats can easily be heard at the low frequencies (< 30 Hz) that are characteristic of the EEG spectrum (Oster, 1973). This perceptual phenomenon of binaural beating and the objective measurement of the frequency-following response (Hink, Kodera, Yamada, Kaga, & Suzuki, 1980) suggest conditions which generate brain waves activity and altered states of consciousness (hypnotic trance).

> 40 Hz	Gamma waves	Higher mental activity, including perception, problem solving, fear, and consciousness
13–39 Hz	Beta waves	Active, busy or anxious thinking and active concentration, arousal, cognition, and or paranoia
7–13 Hz	Alpha waves	Relaxation (while awake), pre-sleep and pre-wake drowsiness, REM sleep, Dreams
8–12 Hz	Mu waves	Sensorimotor rhythm Mu_rhythm, Sensorimotor_rhythm
4–7 Hz	Theta waves	deep meditation/relaxation, NREM sleep
< 4 Hz	Delta waves	Deep dreamless sleep, loss of body awareness

There are a growing amount of research efforts reporting changes in consciousness associated with binaural-beats. “The subjective effect of listening to binaural beats may be relaxing or stimulating, depending on the frequency of the binaural-beat stimulation” (Owens & Atwater, 1995). Binaural beats in the delta (1 to 4 Hz) and theta (4 to 8 Hz) ranges have been associated with reports of relaxed, meditative, and creative states (Hiew, 1995), and used as an aid to falling asleep. Binaural beats in the alpha frequencies (8 to 12 Hz) have increased alpha brain waves (Foster, 1990) and binaural beats in the beta frequencies (typically 16 to 24 Hz) have been associated with reports of increased concentration or alertness (Monroe, 1985) and improved memory (Kennerly, 1994).