NOWICKA, Elżbieta, and Ewa SZEWCZAK. “Indoor Sound Pressure Level From Service Equipment in Buildings: Influence of Testing Methods on Measurement Results”. Archives of Acoustics 46, no. 3 (August 24, 2021): 547–559. Accessed January 17, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/2912.