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| | | I® | |
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| | | EC-Dachventilator / EC roof fan | | |
| | | rosenberg | | |
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| | | Geräusche | | Sound levels | | |
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| | | Die Messungen und deren Darstellung erfolgt nach DIN 45635, Teil 38, gemäß dem dort beschriebenen Hüllflächenverfahren, nach dem über eine quaderförmige Messfläche mehrere Messpunkte erfasst werden. | | The sound tests and their performance curves were made according to DIN 45653, part 38, in accordance with the envelope surface method, from which several test points were taken over a cuboid test area. | | |
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| | | In den Kennlinienfeldern ist der A-bewertete Schallleistungspegel LW(A) angegeben, der dem Freiausblas-schallleistungspegel LW(A)8 entspricht. | | The characteristic diagram shows the "A" decibel sound | | |
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| | | | | which corresponds to the free outlet sound | | |
| | level L | ■W(A) | | |
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| | power level L | W(A)8' | | |
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| | | Der Freiansaug-Schallleistungspegel LW(A)5 kann über die relativen Schalleistungspegel genau ermittelt werden, oder nach folgender Berechnung näherungsweise bestimmt werden. | | |
| | | The free inlet sound level LW(A)5 can be obtained via the relative sound power level or with the following calculation. | | |
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| | | LW(A)5 — LW(A) - 4 dB(A) | | 4 dB(A) | | |
| | | LW(A)5 LW | | |
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| | | Für genauere Berechnungen bei Schallschutzmaßnahmen ist der Schalleistungspegel der Oktavbänder von Bedeutung. | | |
| | | The sound level of the octave bands are important to determine the exact noise protection measurements. | | |
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| | | LWokt LW(A) + Lwrel | | LWoct LW(A) + L | | |
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| | | | | | | | | | | | | | | | | | DV Eintrittseite / inlet side | | | relativer Schalleistungspegel LWrel [dB] bei den Oktavmittenfrequenzen fm [Hz] relative sound power level Lwrel [dB] at octave medium frequenzies fm [Hz] | | | | | | Baugrösse / size | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | Hz | | | | 310 | 1 | 0 | -2 | -8 | -7 | -9 | -16 | -20 | dB | | | | 355 | 1 | 0 | -2 | -8 | -7 | -9 | -16 | -20 | dB | | | | 400 | 2 | -2 | -4 | -9 | -9 | -8 | -16 | -20 | dB | | | | | | | | | | | | | | | | | |
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| | | DV Austrittseite / outlet side | | |
| | | | | | | | | | | | | | | | | | 310 | -3 | -4 | -2 | -3 | -4 | -8 | -15 | -18 | dB | | | | 355 | -3 | -4 | -2 | -3 | -4 | -8 | -15 | -18 | dB | | | | 400 | -2 | 0 | 0 | -3 | -5 | -7 | -14 | -20 | dB | | | | | | | | | | | | | | | | | |
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| | | Der austrittseitig zu erwartende A-Schalldruckpegel kann nur annähernd ermittelt werden, da die Umgebungseinflüsse zu starken Abweichungen führen können. | | The sound pressure expected on the outlet side can only be approximately determined as the ambient influences can cause strong deviations. | | |
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| | | 30, | | | |
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| | | 20 | | |
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| | | 10 | | |
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| | | LP(A) LW(A) - A L | | | LP(A) LW(A) - A L | | |
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| | | a= ohne Reflexionen b= mit Reflexionen | | | a= without reflections b= with reflections | | |
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| | | 10 [m] | | |
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| | | 8 | | |
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