Acoustics: The sound of silence | Features

Type	Measures installed	Refurbishment cost	New-build cost
Typical classroom to BB93 requirements	Plastic-faced 600mm x 600mm plasterboard tiles held in place by an exposed grid	£19.50/m2	£15.00/m2
A BB93-compliant classroom enhanced for use by deaf pupils	High-performance 600mm x 600mm glass wool absorber tiles with a textured surface held in place by an exposed grid	£29.00/m2	£22.50/m2
A classroom enhanced to the higher standards recommended by the British Association of Teachers of the Deaf	High performance 600mm x 600mm glass wool absorber tiles with a textured surface and primed edges held in place
by an exposed grid. To improve absorption in the low frequencies, Ecophon Master Extra Bass panels are installed on top of the ceiling.	£53.00/m2	£44.50/m2