3
Peak Hold sound level PH A or PH C
Percentile sound level L : 05 A or L : 05 C
L : 10 A or L : 10 C
L : 50 A or L : 50 C
L : 90 A or L : 90 C
L : 95 A or L : 95 C
•
Measurement time : 1second to 24 hours
•
Measuring ranges
RMS : Total range: 30 to 130dB
Peak Hold : A – weighted or C – weighted over the top 30dB of each
measurement range.
30 – 90 : 63 – 93dB Peak Hold
40 – 100 : 73 – 103dB Peak Hold
50 – 110 : 83 – 113dB Peak Hold
60 – 120 : 93 – 123dB Peak Hold
70 – 130 : 103 – 133dB Peak Hold
•
Max. measurement level: 130dB
•
Self-generated noise level:
Typical values at 23
℃
using the nominal microphone equivalent capacitance of 27pF
(30-90dB range)
Weighting
Electrical
Total
“A”
22.7dB
26.1dB
“C”
21.8dB
29.5dB
Linearity operating range: A-weighted, 1000Hz, 60dB dynamic range.
Total linear operating range:
In accordance with IEC 61672-1, A-weighted, 1000Hz: 30dB to 130dB.
Level range selection:
5 ranges in 10dB steps 30 to 90dB , 40 to 100dB
50 to 110dB , 60 to 120dB
70 to 130dB
LINEAR OPERATING RANGES (L.O.R.)
RANGE: 30 – 90 dB. Test starting point 64 dB for all weightings and frequencies except
31.5Hz A-weighted, for which the starting point is 44 dB.
FREQUENCY
Hz
WEIGHTING
L.O.R.
dB
WEIGHTING
L.O.R.
dB
31.5
A
36.1 – 50.6
C
39.5 – 87.0
1000
A
36.1– 90.0
C
39.5 – 90.0
4000
A
36.1 – 90.0
C
39.5 – 89.2
8000
A
36.1 – 88.9
C
39.5 – 87.0
