BRUEL & KJAER 4184-A, Technical Documentation Manual, Page: 24 / 52

Weatherproof Microphone Unit Type 4184-A – Supplement to Instruction Manual BE 1712 18
The Lower Limit in the following sections is based on the guaranteed worst-case limit for the analyzer and
the nominal Open Circuit Sensitivity of the microphone, under Reference Environmental Conditions,
Sound
Field Correction set to Free-field and no microphone accessories selected.
4.9.1 Maximum Sound Level
The maximum Sound Level that the Sound Level Meter can accommodate without causing damage to the
Sound Level Meter: 176 dB Peak.
4.9.2 Total Range
Total Range is defined as the difference between the Upper Limit on the least sensitive level range, and the
lowest sound pressure level measurable on the most sensitive level range, which can be measured at 1 kHz
within the most conservative tolerance limits, specified in the International Standards IEC 61672–1,
IEC 60651 and IEC 60804:
NOTE: For Sound Exposure Levels, the stated ranges are valid if 10*lg(

t ) is added to the limits.

t being
the averaging time interval, indicated as Elapsed Time , expressed in seconds.
4.9.3 Primary Indicator Range
Primary Indicator Range according to the International Standard IEC 60651:
Table 4.3
Total range
Frequency Weighting
A-weighting
(dB)
B-weighting
(dB)
C-weighting
(dB)
Z-weighting
(dB)
Z-weighting
Extended Low
Frequency
(dB)
150.3 – 40.2 150.3 – 38.8 150.3 – 39.3 150.3 – 44.5 150.3 – 55.5
Table 4.4
Primary Indicator
Range
Range
Upper
Limit
(dB)
Lower Limit
A-weighting
(dB)
B-weighting
(dB)
C-weighting
(dB)
Z-weighting
(dB)
Z-weighting
Extended Low
Frequency
(dB)
Single 132.3 38.9 37.5 38.0 43.2 54.2
High 132.3 57.8 56.2 56.2 61.0 61.8
Low 105.8 38.9 37.5 38.0 43.2 54.2