A multi-year restoration project at a remote 12th-century Khmer temple in Banteay Meanchey province has led to the discovery of a sophisticated hydraulic system designed for acoustic resonance. Known as acoustic siphons, these hidden earthenware pipes were integrated into the temple's central tower to amplify the sound of running water during ritual ceremonies. This discovery suggests that the Khmer architects utilized hydro-acoustic engineering to create an immersive spiritual environment that symbolized the cosmic churning of the ocean.
The restoration team, using ground-penetrating radar, identified a series of subterranean chambers that acted as echo vaults. These vaults were connected to the surrounding moat via narrow stone channels, allowing the priest to manipulate water levels and vary the pitch of the resonant sounds. The findings are being studied by specialists in ethnomusicology and ancient engineering to understand how these soundscapes influenced the religious experience of the Angkorian era.