f [Hz]
250
315
400
500
630
800
1000
1250
1600
2000
2240
dL [dB]
0.06
0.07
0.08
0.16
0.11
0.24
0.22
0.32
0.40
0.64
0.41
U [dB]
≤
0.02
≤
0.05
f [Hz]
2500
2800
3150
3550
4000
4500
5000
5600
6300
7100
8000
dL [dB]
0.56
0.58
0.42
0.43
0.10
0.06
-0.23
-0.41
-0.48
-0.52
-0.61
U [dB]
≤
0.05
f [Hz]
8500
9000
9500 10000 10600 11200 11800 12500 13200 14000 15000
dL [dB]
-0.67
-0.70
-0.82
-1.04
-1.12
-1.21
-1.48
-1.38
-1.44
-1.63
-1.51
U [dB]
≤
0.05
≤
0.07
f [Hz]
16000 17000 18000 19000 20000
dL [dB]
-1.86
-1.85
-2.22
-2.54
-2.66
U [dB]
≤
0.07
-3,0
-2,8
-2,6
-2,4
-2,2
-2,0
-1,8
-1,6
-1,4
-1,2
-1,0
-0,8
-0,6
-0,4
-0,2
0,0
0,2
0,4
0,6
0,8
1,0
100
1000
10000
100000
f[Hz]
dL[dB]
Fig. 1.5. Influence of OP60/2 windscreen.
2. CONTROLLING OF THE INSTRUMENT
DLM-101 sound level meter can be controlled by instrument keyboard.
2.1. Control keys
Instrument keyboard contains following keys:
•
power switch:
•
keys used to select the instrument settings (they also serve as cursors):
•
keys used to control memory and calibration:
