A
k
(m2)
1
0,0096
2
0,0192
3
0,0288
4
0,0384
5
0,0480
6
0,0576
7
0,0672
8
0,0768
Portata aria
3
VkxAkx3600=m /h
1
1
0
0
1
2
0
0
1
0
0
0
8
0
0
9
0
0
6
0
0
7
0
0
5
0
0
4
0
0
LwdB(A) 25
30
35
40
45
1,5
2
2,5
3
4
5
6
v
k
(m/s)
2
4
6
9
14
22
3
2
∆p
t
(Pa)
Serranda 25 %
aperta
∆Pt x5.90
Lw + 20
6
8
10
12
14
16 m
L
t
(v
t
= 0,25 m/s)
2,5
3
1,5
2
2,5
3
4
5
6
7
8m
L
t
(v
t
=0,50m/s)
4
5
I valori Lw (dB (A) ) non tengono conto dell'attenuazione del locale. Test realizzati con plenum standard.
Vt (m/s)
Lt
0.25
x 1
0.37
x 0.67
0.5
x 0.5
0.63
x 0.4
Senza serranda
∆Pt x1.00
Lw + 0
Serranda 100 %
aperta
∆Pt x1.00
Lw + 0
Serranda 50 %
aperta
∆Pt x2.25
Lw + 10
L (m)
1
1.5
2
2.5
3
4
5
6
8
10
Lt (m)
x1 x1.05 x1.10 x1.10 x1.10 x1.10 x1.10 x1.10 x1.15 x1.15
Lw (dB (A))
0
+ 2 + 3 + 4 + 5 + 6 + 7
+8
+ 9 + 10
∆ T°(°K)
- 20 -15 -10
-5
0
+5 +10 +15 +20
Lt
x2.3 x1.84 x1.56 x1.2 x0.92 x0.64 x0.46 x0.37 x0.3
Feritoie
Hz 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000
1
-9
-10 -11 -12
-7
2
-5
-7
-4
3
-3
-5
-5
4
-2
-3
-2
5
-1
-1
-1
6
-1
-2
-1
7
-1
-2
-1
8
-1
-2
-1
-1,4
-1
-3
-8
-13 -15 -14
-18 -19 -20
-16 -20 -22
-13 -14,5 -17
-15 -18,5 -20
-15 -21 -23
-16 -23 -24
-17 -24 -25
-18 -25 -26
-16 -24 -28
-24 -25 -29
-19 -20,5 -25
-26 -30 -31
-31 -30 -33
-33 -38 -34
-34 -40 -36
-36 -40 -38
-32 -33 -35
-30 -32 -34
-26 -33 -33,5
-32 -32 -34
-35 -37 -38
-36 -36 -38
-38 -40 -42
-40 -41 -43
-5
-5
-2
-5
-6
-7
-7
-8
-8
-8
-9
-10 -13 -13
10
-5
-10 -12 -14 -15
-6
-6
-2
0
2
-2
-
4
-
7
-
9
-14 -10
5
-2
7
-3
8
-4
-6
-10
-12
-9
-11 -10
-12 -12
-7
-9
-11
-11 -14 -14
-13 -15 -16
-14 -16 -17
-15 -17 -18
-17 -18 -19
Tolleranza +/-
1
1
2
0,5
0,5
0
1
1
1
1
1
2
2
3
4
3
4
4
3
1
1
Attenuazione*
0
1
0
1
2
3
4
5
6
5
6
4
6
7
7
9
8
8
8
8
9
Lwoct = Lw (dB(A)) + Koct (dB)
Lwoct attenuato = Lwoct - ∆L
*Con isolamento acustico o termo-acustico del plenum.