| Dataset | What is measured | Source |
|---|---|---|
| Stonehenge, 1:12 acoustic scale model | Reverberation, clarity and speech amplification in a laser-scan-based model; raw impulse responses openly licensed. | Cox, Fazenda & Greaney (2020), J. Archaeol. Sci. 122, 105218 |
| El Castillo, Chichén Itzá | The chirped echo from the staircase, explained by periodic-structure diffraction. | Declercq et al. (2004), J. Acoust. Soc. Am. 116, 3328 |
Claims without verified measurements are not benchmarks. Popular figures such as "resonance frequencies" attributed to chambers in the Giza pyramids remain hypotheses. The first test of any such claim is whether there is enough energy to produce the effect at all.