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23
EN
4. PERFORMANCE CURVE
SOUND CURVE
Acoustic test is performed 1.5 meter away from the unit
RECA227
350
300
250
150
200
100
50
0
50
100
150
200
250
300
Volumetric air volume (m
3
/h)
Ext
ernal s
tatic pr
es
sur
e (P
a)
70
dB
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
Oct
av
e sound pr
es
sur
e l
ev
el (dB: o
ver
all A sc
al
e)
Central frequency (Cycle per second)
Hz
