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Larson Davis HVM200
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HVM200 Reference Manual Downloading Data 3-16
y = filter (b4, a4, y); % Apply upward step
end
Table 3.1 Parameters and transfer functions of the frequency
weightings (source: ISO 8041)
Weighting
Band-limiting a-v-transition Upward step Gain
f
1
Q1
f
2
Q
2
f
3
f
4
Q
4
f
5
Q
5
f
6
Q
6
K
Hz Hz Hz Hz Hz Hz
W
b
0,4
1/
100
1/
16 16 0,55 2,5 0,9 4 0,95 1,024
W
c
0,4
1/
100
1/
8 8 0,63 1 11
W
d
0,4
1/
100
1/
2 2 0,63 1 11
W
e
0,4
1/
100
1/
1 1 0,63 1 11
W
f
0,08
1/
0,63
1/
0,25 0,86 0,0625 0,80 0,10 0,80 1
W
h
10
8/
10
1/
10
31/
10
1/
100/(2π) 100/(2π) 0,64 1 11
W
j
0,4
1/
100
1/
∞∞1 3,75 0,91 5,32 0,91 1
W
k
0,4
1/
100
1/
12,5 12,5 0,63 2,37 0,91 3,35 0,91 1
W
m
10
-
0,1
1/
100
1/
1/(0,028 ×
2π)
1/(0,028 ×
2π)
0,5 1 11
NOTE 1 For weighting Wb, Table A.1 of ISO 2631-4:2001 rounds the value of parameter Q
1
to 2 decimal
places. The parameter specified here is the exact value.
NOTE 2 For weighting Wh, Table A.1 of ISO 5349-1:2001 rounds the values of parameters f
1
, f
2
, f
3
and f
4
to 5 significant figures and parameter Q
1
to 2 decimal places. The parameters specified here are the exact
values.
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2

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