Dynamic stiffness

Dynamic stiffness is a key indicator of the effectiveness of sound insulation underlays and of the reduction of impact sound in flooring systems. To determine this property precisely, our experts carry out measurements in accordance with the DIN EN 29052-1 standard. This test method determines the resonant frequency of the vertical fundamental vibration of a system consisting of the insulating material to be tested and a panel placed on top of it, which is excited by sinusoidal signals.

The measurement is carried out on three different samples of the insulating material to ensure the accuracy and reproducibility of the results. The mean value forms the basis for assessing the dynamic stiffness. To compensate for unevenness, the panel must be placed on a layer of plaster on the test specimen in accordance with DIN EN 29052-1. Based on our many years of experience, this layer of plaster can be omitted under certain circumstances, thus simplifying the preparation process and reducing the overall duration of the test without compromising on measurement accuracy.

We are also happy to assist you in carrying out tests to calculate the dynamic stiffness of your sound insulating materials. Please contact our experts directly.
 

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The resonance frequency of the system (test sample and mechanically loading element) is determined by using swept sine excitation at different forces.