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	听	听
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	听

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