Experimental Characterisation of the Far-Field Noise in Axial Fans Fitted with Shaped Tip End-Plates

Table 2

Comparison of acoustic performance.

	Datum fan		TF fan		MVB fan
Volume flow	Unweighted	A weighted	Unweighted	A weighted	Unweighted	A weighted
	𝑂𝐿𝑤	𝑂𝐿𝑤	𝑂𝐿𝑤	𝑂𝐿𝑤	𝑂𝐿𝑤	𝑂𝐿𝑤
m^2/s	dB	dB(A)	dB	dB(A)	dB	dB(A)
8	100,1	92,5	96,7	89,3	98,6	88,1
7	96,8	92,5	96,6	87,9	94,7	86,7
6	95,4	93,2	92,2	87,1	89,9	85,0