Svantek SVAN 958A - Page 245

245
SVAN 958A User Manual
Table C.8.7. SVAN 958A with SA 277C combined Free Field correction with the use of the electrostatic
actuator for 90 deg incidence angle (microphone corrections + compensated Case Effect)
[dB]
Frequency [Hz]
20
25
31.5
40
50
63
80
100
125
160
200
250
315
400
500
630
800
Correction
factors
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
-0.07
-0.15
-0.14
-0.11
-0.08
-0.02
Complex
uncertainty
--
--
--
--
--
0.35
0.35
0.35
0.35
0.35
0.35
0.35
0.35
0.35
0.35
0.35
0.35
[dB]
Frequency [Hz]
1000
1250
1600
2000
2500
3150
4000
5000
6300
8000
10000
12500
16000
20000
Correction
factors
-0.11
-0.05
0.12
0.18
0.61
0.44
1.03
1.67
2.62
3.79
5.04
5.04
3.66
-17.59
Complex
uncertainty
0.35
0.35
0.35
0.35
0.35
0.35
0.35
0.49
0.49
0.49
0.49
0.61
0.61
0.61
Linear operating ranges with the SA277A Airport filter
The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below. For
the Low measurement range and A weighting linearity test at 31.5 Hz, the starting point is 74 dB.
Table C.8.8. Linear operating ranges for the Low measurement range and the SA277C Airport filter (for the
sinusoidal signal and microphone sensitivity 50 mV/Pa)
[dB]
L
AS/F
L
CS/F
L
LINS/F
L
AeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31.5 Hz
26
75
26
112
32
115
26
75
26
112
29
78
52
115
500 Hz
26
115
26
115
32
115
26
115
26
115
29
118
52
118
1 kHz
26
116
26
114
32
115
26
116
26
114
29
119
52
117
4 kHz
26
114
26
112
32
115
26
114
26
112
29
117
52
115
8 kHz
26
110
26
109
32
115
26
110
26
109
29
113
52
112
12.5 kHz
26
75
26
112
32
115
26
75
26
112
29
78
52
115
Table C.8.9. Linear operating ranges for the High measurement range and the SA277C Airport filter (for the
sinusoidal signal and microphone sensitivity 50 mV/Pa)
[dB]
L
AS/F
L
CS/F
L
LINS/F
L
AeqT
L
CeqT
L
AE
L
Cpeak
(t
int
= 2 s)
from
to
from
to
from
to
from
to
from
to
from
to
from
to
31.5 Hz
46
97
46
134
48
137
46
97
46
134
49
100
72
137
500 Hz
46
137
46
137
48
137
46
137
46
137
49
140
72
140
1 kHz
46
138
46
136
48
137
46
138
46
136
49
141
72
139
4 kHz
46
136
46
134
48
137
46
136
46
134
49
139
72
137
8 kHz
46
132
46
131
48
137
46
132
46
131
49
135
72
134
12.5 kHz
46
97
46
134
48
137
46
97
46
134
49
100
72
137