Method guide / 02
Brainwave entrainment
A repeating sound gives the brain a timing reference. Whether brain activity follows it, and what you feel, are separate questions.
Neural entrainment describes an ongoing neural rhythm becoming synchronized with an external rhythm. In wellness audio, “brainwave entrainment” also names methods intended to encourage that response. Playing a rhythm does not prove it has occurred.
At a glance
External rhythm
Neural response
Timing can align
A schematic illustration, not an EEG recording
One rhythm, several ways to present it
Binaural beats present a different tone to each ear. Monaural beats arise when nearby tones combine in the sound signal. Isochronic tones pulse a tone at regular intervals. Distinguish pitch from beat rate: a 200 Hz tone pulsing ten times per second has a 10 Hz pulse rate, not a 10 Hz pitch.
A brain response is one part of the evidence
EEG experiments can detect activity that follows musical rhythms. Findings for binaural-beat entrainment are less consistent. Even a measured response does not establish improved focus, sleep, or mood. Labels such as alpha and theta describe frequency ranges in brain activity; they are not buttons for selecting a mental state.
Research behind the method
How to approach a BioSynCare session
Choose a session for the experience you want, then adjust for comfort. BioSynCare arranges rhythmic sound with breathing, harmony, and optional visuals. The breathing cycle can be much slower than the audio beat. The app does not measure EEG or verify entrainment; notice whether the overall session is useful to you.
Common questions
Does 10 Hz audio put my whole brain into alpha?
No. Brain activity contains many rhythms across different regions. A 10 Hz beat describes a stimulus, not the state of your whole brain, and does not guarantee relaxation.
Which methods need headphones?
Binaural beats need separate left and right signals, so use stereo headphones with both ears covered and mono audio disabled. Isochronic pulses and monaural beats do not require that separation and can be heard through speakers.
Should I match my breathing to every beat?
No. Audio beats may repeat several times each second; breathing cues follow a separate, slower cycle. Follow the inhale and exhale guidance only if comfortable, or breathe naturally.
Keep exploring
Sensory stimulation
Rain on a window, a warm cup, a moving light: sensory stimulation begins with input reaching your senses.
Binaural beats
Two steady tones, one in each ear, can produce a beat you perceive between them.
Guided breathing
A cue for breathing in, a cue for breathing out, and a rhythm you can follow without counting.
Find a session that fits
Explore rhythmic sound, breathing, and sensory design in a BioSynCare session.
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BioSynCare is a wellness app, not a medical treatment or a substitute for professional care.