Radiant noise on the volume flow controller with integrated Venturi tube according to DIN EN ISO 5167-1

 

 

 

DN
(mm)

 

 

 

w
(m/s)

 

 

 

V
(m3/h)

Δpg = 100 Pa

 

 

 

LWA
dB(A)

LW (dB/octave)

fm (Hz)

63

125

250

500

1000

2000

4000

8000

315

2

550

38

32

26

24

24

28

22

30

34

4

1080

38

34

27

26

27

24

22

30

33

6

1610

41

38

31

31

31

27

23

30

36

8

2125

47

41

33

36

35

30

25

30

39

10

2700

47

47

40

40

39

35

29

31

43

 

 

 

 

DN
(mm)

 

 

 

w
(m/s)

 

 

 

V
(m3/h)

Δpg = 250 Pa

 

 

 

LWA
dB(A)

LW (dB/octave)

fm (Hz)

63

125

250

500

1000

2000

4000

8000

200

2

210

29

27

34

36

33

31

30

29

38

4

420

34

31

31

36

35

33

28

21

39

6

650

36

35

33

36

36

34

32

37

41

8

850

38

37

36

40

38

35

33

34

43

9

1055

40

39

37

39

40

37

33

25

43

250

2

345

28

24

27

28

24

20

15

13

29

4

670

33

27

26

31

30

27

22

15

34

6

1020

39

31

28

33

30

26

19

15

34

8

1350

46

33

28

34

29

25

26

30

36

9

1515

36

31

26

32

33

27

28

29

37

315

2

550

38

35

29

28

31

33

28

31

38

4

1080

44

38

31

32

33

32

26

31

38

6

1610

43

43

34

36

36

34

29

31

41

8

2125

47

46

38

39

39

36

30

31

43

10

2700

54

50

42

44

42

40

33

32

47

 

 

 

 

DN
(mm)

 

 

 

w
(m/s)

 

 

 

V
(m3/h)

Δpg = 500 Pa

 

 

 

LWA
dB(A)

LW (dB/octave)

fm (Hz)

63

125

250

500

1000

2000

4000

8000

315

2

550

43

37

32

35

38

39

36

37

45

4

1080

46

43

36

38

40

40

34

33

45

6

1610

51

45

40

40

41

41

34

33

46

8

2125

52

49

42

43

43

43

42

36

49

10

2700

58

55

45

47

46

44

42

37

51

fm

Mid frequency of the octave band

LW

Sound power level determined in reverberation chamber

LWA

Total sound level, A-evaluated

Δpg

Total pressure difference (measured upstream and downstream from the volume flow controller)

V

Volume flow

w

Flow velocity