Theorized speculative starter Engineering Design (theoretical)

Acoustic-piezo chamber entrains 500 brains for the cost of 1 tACS device — 500x more efficient

Catalogued: February 15, 2026
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Full Description

Modern tACS (transcranial alternating current stimulation) entrains one brain at a time using electrode patches at $5,000-50,000 per device. A Community Chamber ($100K) entrains 20 people simultaneously = $5K per brain. A Temple-Scale structure ($5M) entrains 500 people = $10K per brain. But the chamber works for millennia (pyramids prove this), amortizing to effectively zero per session. More importantly: tACS cannot create inter-brain synchrony. The chamber does this automatically. The ancient technology achieves something modern neuroscience CANNOT: wireless, simultaneous, scalable brainwave entrainment with inter-brain phase-locking.

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