Neuro-Acoustic ASSR Visualizer

How NightShift Entrainment Works Inside the Brain

Select a clinical protocol below to see how dichotic binaural carrier tones enter the left and right ears, converge in the brainstem, and phase-lock your cerebral cortex.

1. Select a NightShift Neuro-Acoustic Frequency

2. Dichotic Auditory Pathway & Brainstem Phase-Locking

15 Hz Cortical SMR / Beta Lock

L: 242.5Hz | R: 257.5Hz → Δ 15.0 Hz Lock

📐 Dichotic Frequency Subtraction

Left Ear Tone (f_L): 242.5 Hz

Right Ear Tone (f_R): 257.5 Hz

Brainstem Pulse (|f_R - f_L|): 15.0 Hz

1. Dichotic Ear Isolation Because 242.5 Hz and 257.5 Hz are fed separately into the left and right ears, the two tones do not mix in the air—they travel independently down each cochlear nerve.

2. Superior Olivary Complex (Brainstem) The Superior Olivary Complex compares the phase timing from both ears and fires an electrical impulse at the exact mathematical difference (15 times per second).

3. Cortical ASSR Phase-Locking Through the Auditory Steady-State Response (ASSR), your cerebral cortex synchronizes its electrical EEG rhythm to match that target frequency.

3. Live Dual-Channel Oscilloscope & Spectral Notch

Oscilloscope (Time): Left/Right Carrier Interference & Beat Envelope

📈 Live Phase Oscilloscope 🔊 Pure Sine Carriers

🎛️ Acoustic Layer Mixer (Live Synthesis & Graph) Tap any layer before or during playback

🎧 Put both earbuds in: Run a 30-second calibration sample and switch layers above to feel the notch lock.

🔬 Why This Frequency Works for Night Shift Workers

15 Hz High-Beta: Overcoming the 3:00 AM Core Temperature Trough

Between 3:00 AM and 5:00 AM, your core body temperature drops to its lowest biological point (~97.1°F), causing prefrontal working memory and reaction speed to plummet. Because drinking coffee after 2:00 AM destroys your 8:00 AM daytime sleep, 15 Hz High-Beta (calibrated to the upper boundary of the Sensorimotor Rhythm band) drives cortical alertness without chemical stimulants or cardiovascular jitteriness.

🛡️ Surgical Spectral Notch (±35 Hz)

Standard white-noise apps bury binaural beats under harsh static. NightShift carves a surgical ±35 Hz bandstop notch out of our Brown-Noise Rain & Synth layers right around the 250 Hz carrier—so your brainstem locks onto the beat effortlessly without ear fatigue.

📚 Peer-Reviewed Evidence

Lane et al. (1998), Physiology & Behavior & Chaieb et al. (2015), Frontiers in Psychiatry demonstrated that Beta-frequency binaural beat stimulation significantly sustains vigilance task performance and working memory during extended fatigue windows.

🎧 Play Full 10-Min Track (Free & Pro) → 🌡️ See When to Use on Simulator →