The trend to build higher wooden houses with high performance gives new challenges. To combine a good stability of the house with high sound performance is essential. To be successful, an efficient understanding for both statics and acoustics are needed. This paper investigates the sound insulation of a modem wooden house. The multi family house has seven stories that are constructed with wood. The quality of the sound insulation is expected to be higher than usual building regulations as the owner requested so. The sound reduction index and impact level were measured between similar flats placed above each other. Also the attenuation for a modem floor structure in the building was measured. It is shown that the attenuation for the modem solution is not much influenced from the beams of the floor structure.
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