TPM 092/13
13
Tab. 7.1.1. Coefficient of local pressure loss
D
100
125
140
150
160
180
200
2,736
2,099
1,781
1,527
1,272
0,929
0,636
Diagram 6.2.1. Pressure losses for air density =1,2 kg.m
-3
6.2.
Determination of pressure loss by using diagram 6.2.1. = 1,2 kg.m
-3
7.1.
Coefficient of local pressure loss
(-)
7.
Coefficient of local pressure loss
8. Noise data
8.1.
Level of acoustic output corrected with filter A.
8.2.
Level of acoustic output in octave ranges.
L
WA
[dB(A)]
level of acoustic output corrected with filter A
L
W1
[dB]
level of acoustic output L
W1
related to the 1 m
2
section (see Tab. 8.3.1.)
S
[m
2
]
effective area of the damper
K
A
[dB]
correction to the weight filter A (see Tab. 8.3.2.)
L
WA
= L
W1
+ 10 log(S) + K
A
L
Woct
[dB]
spectrum of acoustic output in octave range
L
W1
[dB]
level of acoustic output L
W1
related to the 1 m
2
section (see Tab. 8.3.1.)
S
[m
2
]
effective area of the damper
L
rel
[dB]
relative level expressing the shape of the spectrum (see Tab. 8.3.3.)
L
Woct
= L
W1
+ 10 log(S) + L
rel
