“Comparative Investigation of Engine Compartment Insulation Materials on ECE R51 Pass-By Noise Performance of M3 Category Buses”. In 1st International R&D, Design and Innovation Conference Proceedings Book, 37–47. Proceedings. BAUDER Press, 2026. Accessed August 26, 2026. https://press.bauderpress.org.tr/index.php/bauderpress/catalog/book/1/chapter/3.