Schallabsorptionseigenschaften von Lehmoberflächen.

Sound absorption properties of clay surfaces At present, the historical building material clay is once again being used much more frequently in the construction industry. It is increasingly being used in residential and non‐residential buildings as plaster, building panels or design elements in the form of rammed earth or clay blocks. Because there are few reliable measurements of the sound absorption properties of clay surfaces, the frequency‐dependent sound absorption coefficients of a classic rammed earth wall and a surface plastered with clay were determined using the reverberation chamber method according to EN ISO 354 as part of the DBU‐funded EcoSights research project. Furthermore, a series of tests with measurements using the impedance tube (Kundt′s tube) according to DIN EN ISO 10534‐1 was carried out with rammed earth. The weight loss and the change in the surface structure of the samples were recorded. For the investigated clay surfaces, higher sound absorption coefficients than the design values for equivalent materials used for the purpose in building practice were obtained. [ABSTRACT FROM AUTHOR]