Yousif Badri: Breaking the wall of sound with granular media

Yousif Badri  
University of Auckland 

Lightweight buildings are more sustainable to construct, but often provide poor sound insulation between neighbouring spaces. This research explores the use 
of granular materials to improve acoustic performance without relying on heavier construction materials that often have higher environmental impact.  
By characterising how interparticle interactions and porous-frame behaviour in granular materials dissipate sound waves, this research will turn waste-derived 
granular materials into practical acoustic-insulation systems. 

Yousif Badri is a PhD candidate and research assistant at the Acoustics and Vibration Research Centre at the University of Auckland. He is part of the 
Acoustic Materials and Metamaterials Group, which investigates methods to control wave propagation in continuous and granular media. His research 
experimentally and theoretically quantifies frequency-dependent vibration energy loss in granular media. His mechanical engineering background 
includes an MSc from Qatar University, and a BSc with Honours from the University of Khartoum.