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t-NEXT DF DX
EXAMPLE FOR MACHINES NOISE EMISSION CALCULATION
OVER MACHINE WITH PLENUM ON AIR DELIVERY
OVER MACHINE WITH DUCT AND PLENUM ON AIR DELIVERY
OVER MACHINE WITH DUCT AND PLENUM ON AIR DELIVERY
IMPORTANT
The declared noise levels are intended in free field conditions.
The noise pressure level of an installed unit is affected by the room acoustic characteristics.
Please consider an average noise increase of +4/+6 dB(A).
T_tNEXTDFDX_0719_EN
Lp A = Air intake Over catalogue value
Lp B = Air delivery Over catalogue value – plenum noise reduction
Lp A+B = 10 log
Blind front panel
Lp A = Front side Over catalogue value
Lp B = Air delivery Over catalogue value
Lp C = Lp A + 6dB(A) – plenum noise reduction
Lp A+C = 10 log
The point B do not influence the point A+C
Lp A = Front side Over catalogue value
Lp B = Air delivery Over catalogue value
Lp C = Lp D = Lp A + 6 dB(A) – plenum noise reduction
The points B, C and D do not influence the point A
Blind front panel
(
)
LpA
LpC
10
+10
10
10
10
(
)
LpA
LpC
10
10
+10
10
10
85
MEHITS S.p.A.
DATA BOOK
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