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Appendix
Level Linearity of Third-Octaveband-Spectrum
* If the sensitivity Sx deviates from the given data, a correction value of 20*log(Sref/Sx) has to be added.
Example: Sx = 45 mV/Pa -> correction value = 20*log(42/45) = -0.6 dB
in accordance with IEC 61260.
All values refer to Sref = 42 mV/Pa*.
Nominal
Frequency
Hz
Level Range
LOW MID HIGH
20 24-106 dB 24-125 dB 40-134 dB
25
31.5
40
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
50
63
80
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
100
125
160
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
200
250
315
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
400
500
630
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
800
1000
1250
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
Nominal
Frequency
Hz
Level Range
LOW MID HIGH
1600
2000
2500
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
40-134 dB
3150
4000
5000
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
40-134 dB
40-134 dB
46-134 dB
6300
8000
10000
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
46-134 dB
46-134 dB
46-134 dB
12500
16000
20000
24-106 dB
24-106 dB
24-106 dB
24-125 dB
24-125 dB
24-125 dB
46-134 dB
46-134 dB
46-134 dB
The sampling rate of the filters is 48 kHz.