Noise measurents at civil building constructions
For proving of sound transmission losses STC values and impact sound levels , (e.g. sound insulation between flats, rooms, ceilings, etc.) the following values are used:
Sound transmission loss STC or R´w
impact sound transmission levelL´nw
For measuring these values Sound transmission loss STC and impact sound transmission level special equipment is required as the speakers (Dodekaeder) and a rated impact sound transmission - Hammer. The sound meter controls automatically the noise generator, recording of levels and estimation of reverberation time.