Sound Pressure Level L; Calculation Based On Sound Power Level, Distance And Directivity - Wolf BWL-1S-05 Installation And Operating Instructions Manual

Q = 4: Heat pump or air intake/discharge (indoor installation) on a house wall
Q = 8: Heat pump or air intake/discharge (indoor installation) on a house wall with recessed corner in exterior wall
31.3 S ound pressure level L
directivity
Appliance type
BWL-1S(B)-05/230 V
BWL-1S(B)-07/230 V
BWL-1S(B)-10/400 V
BWL-1S(B)-14/400 V
BWL-1SB-10/230 V
BWL-1SB-14/230 V
BWL-1S(B)-16/400 V
Night mode can reduce the maximum noise emissions.
It should be noted that this also decreases the maximum performance.
Directivity Q
Q = 2 (outdoor installation)
Q = 4 (installation up to 3 m from a wall)
Q = 8 (installation in a corner, up to 3 m from the walls)
Formula:
L
PA
Example:
BWL-1S-07/230 V; Q = 4 installation on a house wall; distance 8 m
Max. sound pressure level = 63 dB(A) - 23 dB(A) = 40 dB(A)
Max. sound pressure level, night 55 % = 56 dB(A) - 23 dB(A) = 33 dB(A)
3064298_201805
Sound level
calculation based on sound power level, distance and
PA
Max. "Max. night
60 57
63 59
64 59
65 60
65 60
64 61
66 61
1 m
8
5
2
= L - ΔL
WA
Sound power level L
WA
"Max. night
75 %" 65 %"
57
57
58
59
59
60
60
Distance from sound source
2 m 4 m 5 m
Differential ΔL in relation to sound power level L
measured in dB(A) at the outdoor module
14 20 22
11 17 19
8 14 16
dB(A)
"Max. night "Max. night
55 %"
56
56
57
58
58
59
59
6 m 8 m 10 m 12 m
WA
23.5 26 28 29.5
20.5 23 25 26.5
17.5 20 22 23.5
45 %"
56
56
57
57
58
58
57
15 m
31.5
28.5
25.5
89