Svantek SV 971A, User Manual

Page: 210 / 305

SV 971A User Manual
– Appendixes
210
SV 971A Diffuse Field compensation filter
Note: Using special filters might change the frequency response and measuring ranges of
SV 971A. Please check the below given specification.
Linear operating ranges for LEQ measurements with the Diffuse Field 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 79 dB.
Table C.1.4. Linear operating ranges for the Normal measurement range for the Diffuse Field filter (for
the sinusoidal signal and microphone sensitivity in the range 32 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 28 97 28 120 28 134 35 137 28 97 28 120 28 134 31 100 53 137
500
Hz 28
133
28
136
28
137
35
137
28
133
28
136
28
137
31
136
53
140
1 kHz 28 137 28 137 28 137 35 137 28 137 28 137 28 137 31 140 53 140
4 kHz 28 138 28 136 28 136 35 137 28 138 28 136 28 136 31 141 53 139
8 kHz 28 136 28 134 28 134 35 137 28 136 28 134 28 134 31 139 53 137
12.5 kHz 28 132 28 131 28 131 35 137 28 132 28 131 28 131 31 135 53 134
Table C.1.5. Linear operating ranges for the Low measurement range for the Diffuse Field filter (for the
sinusoidal signal and microphone sensitivity in the range 32 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 83 25 106 25 120 33 123 25 83 25 106 25 120 28 86 50 123
500
Hz
25
119
25
122
25
123 33 123
25
119
25
122
25
123
28
122 50 126
1 kHz 25 123 25 123 25 123 33 123 25 123 25 123 25 123 28 126 50 126
4 kHz 25 124 25 122 25 122 33 123 25 124 25 122 25 122 28 127 50 126
8 kHz 25 122 25 120 25 120 33 123 25 122 25 120 25 120 28 125 50 123
12.5 kHz 25 118 25 117 25 117 33 123 25 118 25 117 25 117 28 121 50 120