Sound absorption

The majority of standard concrete blocks with hard surfaces are highly reflective to sound, thus creating long reverberation times within building enclosures. Acoustic-absorbing concrete blocks are manufactured with a slot on the exposed face which admits sound into the central cavity (Fig. 2.1). Since the void space is lined with sound-absorbing fibrous filler, incident sound is dissipated rather than reflected, significantly reducing reverberation effects. Acoustic control blocks in fairfaced concrete are suitable for use in swimming pools, sports halls, industrial buildings and auditoria.

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