Using a compact setup for the measurement of impact noise reduction

摘要

To determine the impact noise reduction of floor coverings according to ISO 10140, a test facility consisting of two rooms with a volume of 50 m~3 each is necessary. To minimize the effort for such a measurement, a compact measurement setup has been developed. This setup consists of a 1.2 m × 0.8 m × 0.2 m concrete slab for heavyweight floors or a timber joist construction for lightweight floors. Instead of the sound pressure in a receiving room, the acceleration of the lower face of the slab is measured while the upper face is excited by a tapping machine. Comparisons between measurements performed in the test facility according to ISO 10140 and according to the compact method show good conformity for soft floor coverings. Research shows furthermore that larger differences occur for the determination of the impact sound reduction of plate-like coverings. For a laminate covering it is shown that these differences are the result of a poor coupling between the floor and the laminate plates. Another aim of the current research is to determine the normalized impact sound pressure level for specific ceilings at a compact setup by means of the acceleration and the radiation efficiency.