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
