Dresden 2017 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 56: Posters - Granular and Particulate Matter
DY 56.1: Poster
Thursday, March 23, 2017, 17:00–19:30, P1A
Sound absorption of stratified and blent granulates — •Hannes Pravida1 and Thomas Grillenbeck1, 2 — 1Iganz-Günther-Gymnasium Rosenheim — 2Fakultät für angewandte Natur- und Geisteswissenschaften, Fachhochschule Rosenheim
We examine the sound absorption coefficient of granulates. We are especially interested in how the sound absorption depends on the mixture and the size of the granular materials. Our experiment is implemented by a variant of "Kundt's Tube" which sends an acoustic signal to granulates and appraises the reflected sound wave.With these data we can calculate the sound absorption coefficient. Moreover we analyze how and why the sound absorption coefficient changes when we blend sound-absorbing and sound-reflecting granular materials.