Sper Scientific 840015 Sound Meter Type 1 - Manual (Page 6)

6
Frequency A Weighting C Weighting
Tolerance
(IEC 61672
Class 1)
31.5 Hz -39.4 dB -3 dB ± 2.0 dB
63 Hz -26.2 dB -0.8 dB ± 1.5 dB
125 Hz -16.1 dB -0.2 dB ± 1.5 dB
250 Hz -8.6 dB 0 dB ± 1.4 dB
500 Hz -3.2 dB 0 dB ± 1.4 dB
1 kHz 0 dB 0 dB ± 1.1 dB
2 kHz +1.2 dB -0.2 dB ± 1.6 dB
4 kHz +1 dB -0.8 dB ± 1.6 dB
8 kHz -1.1 dB -3 dB
+2.1 dB
-3.1 dB
6. FREQUENCY WEIGHTING (A and C) CHARACTERISTICS
Tolerance
(ANSI S1.43
Type 1)
± 1.5 dB
± 1.0 dB
± 1.0 dB
± 1.0 dB
± 1.0 dB
± 1.0 dB
± 1.0 dB
± 1.0 dB
+1.5 dB
-6.0 dB
12.5 kHz -4.3 dB -6.2 dB
+3.0 dB
-6.0 dB
+3.0 dB
-6.0 dB
16 kHz -6.6 dB -8.5 dB
+3.5 dB
-17.0 dB
+3.0 dB
-no limit
Time Weighting
Max. response ref.
continuous signal
Tolerance
(IEC 61672 Type 1)
F (Fast) -1.0 dB + 1.0 db
S (Slow) -4.1 dB ± 1.0 db
Tested with signal on 1000 Hz/94 dB.
7. TIME WEIGHTING (Fast and Slow) CHARACTERISTICS