In Europe, national acoustic classification schemes for housing exist in about ten countries. The schemes specify a number of quality classes, reflecting different levels of acoustic protection, and include class criteria concerning several acoustic aspects, main criteria being about airborne and impact sound insulation between dwellings, facade sound insulation and service equipment noise. The...

Social surveys in several European countries have shown that inhabitants of multifamily dwellings are considerably annoyed by noise from their neighbour's activities. This is also in countries where sound insulation minimum requirements exist and have been enforced for many years. It is therefore necessary to establish data on the sound levels of activities in residential buildings and undertak...

It is common to use sound insulation as a last resort for noise control in an urban city. Sound insulation of air-conditioned building is of importance. The stiffeners have important effects on the sound insulation properties of a stiffened structure. The experimental studies on the stiffened structures are vital for the study of the stiffener effects. Based on this concern, a simple stiffened ...