GHAVAMABADI, leila, M. HESAMPOUR, B. DEHAGHI, K. AAHMADIANGALI, N. DEHGHAN, and S. MIKAEILPOUR. “Modification of Noise Reduction by SiO2 Nanocomposite: The Case of Earplugs”. Romanian Journal of Acoustics and Vibration, Vol. 19, no. 2, Mar. 2023, pp. 70-74, http://rjav.sra.ro/index.php/rjav/article/view/264.