AcoustaPLOT Echo

Fixing classroom echo without suspended ceilings

Oct 6, 2026 6:02

A Victorian primary-school classroom brought from 1.15s down to 0.55s reverberation, inside BB93's refurbishment limit -- without touching the ceiling.

An illustrative worked example: an 8 x 6.5 x 3.6m Victorian classroom (187m3) with a baseline reverberation time of 1.15 seconds -- well outside BB93 Table 6's refurbishment limits (0.8s primary, 1.0s secondary).

Treated with roughly 26m2 of…