BRUEL & KJAER 2245 - Pulse Range; Linear Operating Range; Peak C Range

Sound Level Meter Types 2245 – Instruction Manual Page 58 of 110
4.9.6 Pulse Range
Pulse Range according to the international standard IEC 60804 is the difference
between the Upper and Lower Limit in the following table:
Table 4.7 Pulse Range
Please note: For Sound Exposure Levels, the stated ranges are valid if 10*lg(Δ t ) is added
to the limits. Δ t being the averaging time interval, indicated as Elapsed
Time , expressed in seconds.
4.9.7 Linear Operating Range
The starting point for all the Linear Operating Range tests is 94.0 dB.
Linear Operating Range according to the International Standard IEC 61672–1:
Table 4.8 Linear Operating Range
Please note: For Sound Exposure Levels, the stated ranges are valid if 10*lg(Δ t ) is added
to the limits. Δ t being the averaging time interval, indicated as Elapsed
Time , expressed in seconds.
4.9.8 Peak C Range
Peak C Range according to the international standard IEC 61672– 1 is:
Table 4.9 Peak C Range
A-weighting
(dB)
B-weighting
(dB)
C-weighting
(dB)
Z-weighting
(dB)
145.1 19.3 19.0 21.5 28.2
Upper
Limit
(dB)
Lower Limit
Lower
Limit
31.5 Hz
(dB)
1 kHz
(dB)
4 kHz
(dB)
8 kHz
(dB)
12.5 kHz
(dB)
All
(dB)
A-weighting 101.8 140.9 142.1 140.0 136.0 22.7
B-weighting 124.2 140.9 140.4 138.2 134.2 22.4
C-weighting 138.3 140.9 140.3 138.1 134.1 24.9
Z-weighting 141.3 140.9 141.1 141.1 140.4 31.6
Frequency
Weighting
Upper Limit
Lower
Limit
31.5 Hz
(dB)
1 kHz
(dB)
4 kHz
(dB)
8 kHz
(dB)
12.5 kHz
(dB)
All
(dB)
141.3 143.9 143.3 141.1 137.1 41.7
Upper Limit