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Binaural - Low Alpha
Alpha brainwaves (7-13 Hz) are associated with relaxation and/or drowsiness. Binaural beats result from hearing two frequencies at the same time, one in each ear. The binaural beat is difference between the two frequencies. For example, if you hear a 210 Hz sound in your left ear and 200 Hz sound in your left, your brain "hears" 10 Hz (210-200=10). This happens if the difference between the right and left frequency is less than 100 Hz. The right and left ears need to hear different sounds so you must use stereo headphones for binaural beats to occur. Speakers don't work. Binaural beats can increase brain wave activity within a specific range because our brain waves mimicking the frequency. This is called entrainment or frequency-following response. Think of binaural beats as subsonic frequencies heard within our brain.