[1]
T. SZENTMÁRTONY, I. KURUTZ, and G. KOSCSÓ, “REDUCING THE DISCHARGE SIDE NOISE EMISSION IN RADIAL FLOW FANS WITH ABSORBENT COVER INSIDE THE SPIRAL CASING ”,
Period. Polytech. Mech. Eng.
, vol. 36, no. 1, pp. 17–31, Jan. 1992.