Bilateral Harmonics
10-carrier Bilateral Beat Generator
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Bilateral Beats

Most brain waves are characterized by frequencies that are below the audible range. Therefore, if you want to try stimulating your brain using sound, you first need to convert those sub-frequencies into something you can hear. That can be achieved by using a carrier that is located in the audible range, and modulating this carrier with the frequency that corresponds to the brain wave one wants to heighten. Different modulation techniques can be used. Isochronic Tones modulate the amplitude of the carrier, while bilateral beats — the method used by this generator — modulates the stereo image of the sound. Therefore, using headphones is highly recommended to achieve the strongest modulation effect, with this one.

Brain Waves (brainwaves) Entrainment

Brainwaves are electrical activity patterns caused by the neurons of the brain communicating with each other. Brainwaves can be detected using sensitive medical equipment such as an EEG. They provide an indication of the mental state of an individual.

Brainwaves are divided into four main categories: the Delta waves, when deep sleep occurs; the Theta waves, associated with a state of somnolence and reduced consciousness; the Alpha waves, when we are in a state of physical and mental relaxation; and the Beta waves, emitted when we are consciously alert, or when we feel agitated or tense.

Brainwave frequencies are in the range of 0.1 to 4 (Delta), 4 to 7 (Theta), 7 to 13 (Alpha) and 13 to 30 (Beta) cycles per second (Hz).

Brainwave entrainement (or synchronization), aims to cause our brainwave frequencies to fall into step with a periodic stimulus having a frequency corresponding to the intended brain-state. This can be used, for example, to induce sleep. This page uses bilateral beats as auditory stimuli.

Testimonials - write yours here

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  This one made me lift my head up :) Thx for playing around with those sliders, person a couple hearts below me!

  The preset "All Harmonics" does a really cool job when animating the sliders. It's melody after melody. Just beautiful.

  I usually have a hard time focusing on my essays while listening to music, but this really helped me out! It let me feel calm and focused, without raising my anxiety up.

  Geez I don't know, it just feels like a really nice mix. It almost forces you to forget everything thats going on. Would be absolutely great for meditation.

  Opposite of Odd Harmonics, it's amazing!

  Whenever I get a migraine I can't shake, I put this on... Sometimes it takes a little while before the tracks "line up", but when it starts hitting the heavy harmonies, it's like a massage for my brain... The sound shakes it in JUST the right way. Thanks!

  Using the preset 'Calm'; it's like it's massaging my brain. Very calming indeed :)

  I was listening to them, and it was AMAZING! When I played fear, I could hardly breathe. When I played fantasy, I could picture so much wonder in my mind! When I played focussed, I had all my work done almost immediately! Thank you.

  Okay I was one of those people who didn't think that listening to noise/music would help me with my studies. Although noises do not relax me, this noise in particular actually does help me focus and keeps me going. I'm legitimately scared that I'll become dependent on it in order to study, but hey it's the new age and I should take advantage of technology if it helps me. I'm not cheating or anything.

  Playing around with the presets, I really enjoy the Delta wave settings, with a hint of Theta for harmony. Adding the low Alpha adds a new sense of harmony, remaining relaxing, yet somehow oddly urgent and energizing. By focusing on different elements of the repetition, it seems almost as if new melodies form spontaneously.

  I really like this generator and it's really effective but works best if you have it on at least 15 minutes while doing very little activity.

  Powerful, alerting yet can put you into a trance.

  The even harmonics are a great resolve to the odds! Love it :)

  I'm losing something I never needed in the first place...

  I love Bilateral Harmonics simply because of the bizarre way it instantly puts me to sleep. It's also amazing that when I listen to the harmonics just long enough, the simple beats and harmony form into a rhythmic song or tune. It's really extraordinary!

  I think it's neat how the different types of brainwaves line up perfectly with the natural tonal harmonic series.

  I love generators like these and this has to be the one with the strongest effect yet (though I'm weird, I sort of enjoy the Shepard Madness). Even without headphones, I feel a bit altered from these tones.

  Typically these types of generators don't do much for me, but this one seems to be doing something. Pretty neat!

Current Slider Settings

Save in URL
Save as Cookie > Load
Clone as Minified Player
Order as an Audio file    

Presets

2-Carrier • 3-Carrier • 4-Carrier • 5-Carrier • All Harmonics • Odd Harmonics • Even Harmonics • Calm • Alert

1 Hz - Delta | Lethargic
2 Hz - Delta | Deep Sleep
3 Hz - Delta | Dreamless
4 Hz - Theta | Drowsy
6 Hz - Theta | Fantasy
8 Hz - Alpha | Relaxed
12 Hz - Alpha | Conscious
16 Hz - Beta | Focussed
24 Hz - Beta | Active
32 Hz - Beta | Fear /!\

Animation Control

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Usage

Each slider controls a particular frequency. Adjust sliders to induce a particular mental state. Mixing adjacent sliders works best.

Caution

Our brainwave generator specifically outputs frequencies that replicate the cycles of brain waves. By syncing up your brain with these frequencies, your state of consciousness will be altered.

Because of the strong and repetitive pulsating rhythms, people who are prone to seizures or epilepsy should not use our brainwave generator. Children and pregnant women should also use caution when considering using brainwave entrainment.