Theorized established starter Chichen Itza / Multiple Maya Sites

El Castillo Staircase Chirp Is an Optimal Brainwave Entrainment Signal

Catalogued: February 15, 2026
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Full Description

The documented chirped echo of El Castillo (Lubman; Declercq 2004, JASA) is a descending frequency sweep produced by the 91-step staircase acting as an acoustic diffraction grating. Frequency-chirped signals are MORE effective at neural entrainment than pure tones because they: (1) sweep through the target band guaranteeing frequency match, (2) prevent neural adaptation since the brain cannot tune out a moving frequency, (3) create rhythmic frequency sweeps with each acoustic impulse. Chirp sonar is the most sophisticated signal processing technique in modern radar and sonar systems. The Maya encoded it in stone geometry. Multiple Maya pyramids produce similar chirped effects (Declercq). This is the most acoustically sophisticated pyramid design of any site globally.

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