HVM200 Reference Manual
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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
Q
1
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
∞
1
1
W
d
0,4
1/
100 1/
2
2
0,63
∞
1
∞
1
1
W
e
0,4
1/
100 1/
1
1
0,63
∞
1
∞
1
1
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/(2
π
)
100/(2
π
)
0,64
∞
1
∞
1
1
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 ×
2
π
)
1/(0,028 ×
2
π
)
0,5
∞
1
∞
1
1
NOTE 1
For weighting
W
b, 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
W
h, 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
Summary of Contents for HVM200
Page 2: ...IHVM200 01 Rev C Larson Davis HVM200 Reference Manual...
Page 48: ...HVM200 Reference Manual Frequency Weighting Curves A 9...
Page 49: ...HVM200 Reference Manual Frequency Weighting Curves A 10...
Page 50: ...HVM200 Reference Manual Frequency Weighting Curves A 11...
Page 51: ...HVM200 Reference Manual Frequency Weighting Curves A 12...
Page 63: ...HVM200 Reference Manual Integration Weighting Limits A 24...
Page 64: ...HVM200 Reference Manual Integration Weighting Limits A 25...
Page 65: ...HVM200 Reference Manual Integration Weighting Limits A 26...
Page 66: ...HVM200 Reference Manual Integration Weighting Limits A 27...
Page 67: ...HVM200 Reference Manual Integration Weighting Limits A 28...
