Archaeologists at the Mohenjo-Daro site have unearthed a massive semi-subterranean structure that appears to have been designed specifically for its acoustic properties. The hall features a series of parabolic wall niches and a unique floor paved with porous terracotta tiles, which researchers believe were intended to modulate sound and prevent echoes during communal rituals or performances.
Excavations led by the Heritage Science Review team revealed that the chamber could comfortably house over 200 people. Small, hollow clay vessels found within the wall recesses suggest a sophisticated understanding of resonance and sound amplification. These 'acoustic jars' are similar to those found in much later medieval European churches, pushing back the history of architectural acoustics by several millennia.