KOPANIA, Joanna Maria; WÓJCIAK, Kamil; GAJ, Patryk; BOGUSŁAWSKI, Grzegorz. The influence the surface of ventilation duct on sound attenuation in the airflow. Archives of Acoustics, [S. l.], 2026. DOI: 10.24423/archacoust.2026.4328. Disponível em: https://acoustics.ippt.pan.pl/index.php/aa/article/view/4328. Acesso em: 6 apr. 2026.