Perforated brick with specific raw density and specific numbers of rows of perforations for improved sound insulation

摘要

The raw density of the brick (2) is at least 0.81 kg/dm cubed and with a width B of 36.5 cm has at least 32 rows of perforations (4) or in dependence on its width B has LR rows of perforations separated by longitudinal webs (6) with LR equal to or greater than 32/36.5 cm x B (cm). The holes can be narrow slits whose side length in the width direction of the wall is less than 7. 4 mm.