t-NEXT DF DX
T_tNEXTDFDX_0719_EN
84
MEHITS S.p.A.
DATA BOOK
EXAMPLE FOR MACHINES NOISE EMISSION CALCULATION
UNDER MACHINE WITH DUCT ON AIR INTAKE
Duct
Lp
A
= Front side Under catalogue value
Lp
B
= Air delivery Under catalogue value
Lp
C
= Air intake Under catalogue value
The points
B
and
C
do not influence the point
A
UNDER MACHINE UNDER WITH PLENUM ON AIR DELIVERY
Lp
A
= Front side Under catalogue value
Lp
B
= Air delivery Under catalogue value
–
plenum noise reduction
Lp
C
= Air intake Under catalogue value
Lp
A+C
= 10 log
10
(
10 +10
)
The point
B
do not influence the point
A
LpA
10
LpC
10
UNDER MACHINE WITH PLENUM ON AIR INTAKE
Lp
A
= Front side Under catalogue value
Lp
B
= Air delivery Under catalogue value
Lp
C
= Air intake Under catalogue value
–
plenum noise reduction
Lp
A+C
= 10 log
10
(
10 +10
)
The point
B
do not influence the point
A
LpA
10
LpC
10
OVER MACHINE WITH DUCT
Lp
A
= Air intake Over catalogue value
Lp
B
= Air delivery Over catalogue value
The point
B
do not influence the point
A