Conseil national de recherches du Canada. Construction
24th International Congress on Sound and Vibration ICSV, July 23-27, 2017, London, UK
building acoustics; impact sound; low frequencies; impedance match
Low frequency noise generated from impact sources on floors is becoming more significant due to the trend of using lighter building components. The amount of sound power that gets injected into the floor depends on the impedance matching between the source (e.g. barefoot or shoe walkers) and the receiving surface (e.g. floors unless Spiderman is in the house). In a previous study, it was identified that the impedance of the impact sources at low frequencies has no influence on the power injected into wood or concrete floors without floating toppings. The reason is because the impedance of both the wood and concrete floor is much higher than the source impedance and only the force controls the amount of power injected into the floor. In this current study, calculation models are used to simulate the effect of a floating topping on the injected power by investigating the resulting impedance and impedance match between the floor with a floating topping and the two standardized ISO impact sources (heavy/soft ball and hard tapping machine). Finally, the relevance of impact source impedance at low frequencies will be presented for floors with floating toppings.
Date de publication
International Congress on Sound and Vibration
Proceedings of the 24th International Congress on Sound and Vibration.
Proceedings of the ... International Congress on Sound and Vibration.