November 11, 1997: Egypt & Archaeology - Boris Said & Tom Danley
Danley explains that the pyramid's structure functions like a giant Helmholtz resonator, with wind passing over the air shafts producing infrasound that pervades the chamber. During one nighttime testing session, the low frequencies became so intense that the entire crew fled the King's Chamber, convinced an earthquake was occurring. He also notes that the resonant frequencies form an F-sharp chord, matching the tuning of Native American ceremonial flutes crafted 12,000 miles away.
Boris Said discusses plans to access the 30-by-40-foot chamber detected by ground-penetrating radar beneath the Sphinx, connected by a tunnel running from beneath the causeway. He outlines a diplomatic approach to obtain Egyptian permission for excavation, proposing that Egyptian institutions lead the effort while his crew documents the findings.
Key Moments
30-by-40-foot chamber under the Sphinx's paws: Boris Said describes the seismic backup work for Robert Schoch's geology that turned up a 30-by-40-foot chamber directly under the paws of the Great Sphinx, exactly where Edgar Cayce predicted, and the years-long failed effort to drill into it.
Sonic levitation at Intersonics: Tom Danley, then a NASA contractor at Intersonics, explains his acoustic levitation experiments: ~150 dB at 22 kHz suspends pea-sized objects without contact, with the largest liftable object ~one-quarter wavelength across.
King's Chamber and sarcophagus resonances coincide: Danley reports that several harmonic resonances of the granite sarcophagus coincide with the fundamental resonances of the King's Chamber itself, and that the chamber's acoustic spectrum begins below human audibility.
Phoenix Cyclone test sends the crew fleeing: Using a low-frequency Phoenix Cyclone speaker placed in the King's Chamber, Danley swept resonances near the lowest pipe-organ note (below 20 Hz). The build-up felt like an earthquake and triggered fight-or-flight; seven or eight people ran from the chamber.
Pyramid as a Helmholtz resonator excited by wind: On DAT recordings made later, Danley found the same low-frequency resonances present even when no sound was being produced. He modeled the air shafts and chamber as Helmholtz resonators excited by wind across the pyramid's exterior.