Hoval RoofVent CON-9, Design Handbook

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3.5 Sound levels
Unit type TWP-9
Operating mode VE2 REC
Position
Sound pressure level (at a distance of 5 m)
1)
dB (A) 52 66 51 44 48
Total sound power level dB (A) 74 88 73 66 70
Octave sound power level 63 Hz dB (A) 52 69 57 52 56
125 Hz dB (A) 63 78 67 57 63
2)
250 Hz dB (A) 65 81 66 59 66
500 Hz dB (A) 66 81 64 56 61
1000 Hz dB (A) 71 81 65 61 60
2000 Hz dB (A) 66 80 65 56 58
4000 Hz dB (A) 58 76 62 50 50
8000 Hz dB (A) 44 70 52 42 41
1)
with hemispherical radiation in a low-reflection environment
2) outdoors (roof unit)
Table F6: Sound levels, RoofVent
®
twin pump
RoofVent
®
twin pump
Technical data