Scale model studies on the sound absorption of perforated panels / Katarzyna Baruch, Agata Szeląg, Aleksandra Majchrzak // W: Knowledge, technology and society : AGH ISC 2018 : monograph / sci. ed. Katarzyna ... więcej

Scale model studies on the sound absorption of perforated panels / Katarzyna Baruch, Agata Szeląg, Aleksandra Majchrzak // W: Knowledge, technology and society : AGH ISC 2018 : monograph / sci. ed. Katarzyna Styszko, Paweł Bogacz. – Kraków : Wydawnictwa AGH, 2020. – S. 181-186 : rys., wykr. – Bibliogr. 9 poz., Abstr. – Mat. konf.: AGH International Student Conference: Knowledge, Technology and Society, Kraków, 10-12.10.2018. – ISBN 978-83-66364-51-6

Scale model studies provide key solutions in the areas of science such as aerodynamics and fluid mechanics. Decreased dimensions of the objects under study and the knowledge on the relations between the ... więcej

Scale model studies provide key solutions in the areas of science such as aerodynamics and fluid mechanics. Decreased dimensions of the objects under study and the knowledge on the relations between the model and its full-size equivalent allow conducting numerous tests at significantly reduced costs. In acoustics model studies are most commonly used for investigating the transmission of structure borne and airborne sounds, as well as for the studies on sound absorption phenomenon. Despite such a broad range of application, there is still no method which would allow scaling acoustic perforated panels without changing the values of their sound absorption coefficient. This paper presents the results of a comprehensive analysis on scaling the perforated panels; a number of theoretical and numerical analyses on the measurement samples at 1:1, 1:3 and 1:8 scales will be presented, together with the results of air flow resistivity measurements. The main parameters taken into consideration were the geometry of the samples and their flow resistivity, which is one of the most important parameters which determine the acoustic properties of the materials. These analyses were aimed at finding the basic relations which will allow scaling this type of acoustic panels. These relations will in turn allow producing scaled measurement samples serving as equivalents to full-size acoustic panels, which as a consequence will facilitate the process of designing acoustic perforated panels, keeping the costs of producing the prototypes low.