What Are Binaural Beats?
The lowest frequency that you can hear is about 20Hz, yet some of the most powerful brainwave frequencies that you can experience are often much lower than this threshold. By listening to brainwave audio technologies like binaural beats, you can “trick” your ears into hearing these otherwise inaccessible frequencies. As you listen to brainwave audio technologies, your brain follows the sound patterns and creates the corresponding brainwave frequencies in a natural process called the Frequency Following Response. These brainwave frequencies can help you meditate faster, sleep deeper, and improve focus and concentration.
The most commonly known audio brainwave technology is called a binaural beat, which is perceived by the cortical areas of the brain as a “beating sound”. This occurs when slightly different tones are played at the same time. For example, when an engineer plays a frequency of 300Hz in the right channel, and a 304Hz frequency in the left channel, the brain will perceive a third frequency at 4Hz, which is the beat frequency. The listener then slips into a Frequency Following Response, in which the brainwave patterns of the listener’s brain follow and match the beat frequency.
Binaural Beat Audio Example
Here is a short audio example of that exact scenario: 3 seconds of a 300Hz tone in the right channel, followed by 3 seconds of a 304Hz tone in the left channel, and finally a combined signal with both tones which produce a 4Hz binaural beat frequency. Listen: you can hear the fluttering if you wear headphones: