Svantek SVAN 979 - Page 334

334
SVAN 979 User Manual - Appendixes
Linear Operating Ranges with the Environmental filter
Table C.7.1 Self-generated noise for different weighting filters
Electrical *)
Acoustical compensated
Weighting filter
Range
A
C
Z
A
C
Z
Low
< 14 dB
< 14 dB
< 21 dB
< 15 dB
< 15 dB
< 23 dB
High
< 21 dB
< 21 dB
< 31 dB
< 23 dB
< 23 dB
< 33 dB
*) measured with the ST 02 microphone equivalent impedance 18 pF +/-10%
The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below.
Table C.7.2 Linear operating range: “LOW” with the Environmental filter for the sinusoidal signal and
microphone sensitivity 50 mV/Pa
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31,5 Hz
25
80
25
103
25
117
41
120
25
80
25
103
25
117
28
83
50
120
500 Hz
25
116
25
119
25
120
41
120
25
116
25
119
25
120
28
119
50
123
1 kHz
25
120
25
120
25
120
41
120
25
120
25
120
25
120
28
123
50
123
4 kHz
25
121
25
119
25
119
41
120
25
121
25
119
25
119
28
124
50
122
8 kHz
25
119
25
117
25
117
41
120
25
119
25
117
25
117
28
122
50
120
12.5
kHz
25
115
25
114
25
114
41
120
25
115
25
114
25
114
28
118
50
117
Table C.7.3 Linear operating range: “HIGH” with the Environmental filter for the sinusoidal signal and
microphone sensitivity 50 mV/Pa
[dB]
L
AS/F
L
BS/F
L
CS/F
L
ZS/F
L
AeqT
L
BeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31,5 Hz
33
97
33
120
33
134
43
137
33
97
33
120
33
134
36
100
70
137
500 Hz
33
133
33
136
33
137
43
137
33
133
33
136
33
137
36
136
70
140
1 kHz
33
137
33
137
33
137
43
137
33
137
33
137
33
137
36
140
70
140
4 kHz
33
138
33
136
33
136
43
137
33
138
33
136
33
136
36
141
70
139
8 kHz
33
136
33
134
33
134
43
137
33
136
33
134
33
134
36
139
70
137
12.5
kHz
33
132
33
131
33
131
43
137
33
132
33
131
33
131
36
135
70
134