Level Linearity Range; Linear Operating Ranges; Self-Generated Noise; Measurement Of Low Noise Levels - SINUS Tango Plus User Manual

4.1 Level linearity range

The following table 4.2 contains the measurement ranges for A-weighted sound levels and the C-weighted
peak sound level for microphone sensitivity of 50 mV/Pa.
Fast/Slow/Leq in dB(A) L
25. . . 140
Table 4.2: Level linearity ranges for A-weighted sound levels and C peak

4.2 Linear operating ranges

The operating ranges given below are only valid for calibrated devices! The last columns show the starting
values for the level linearity tests.
max in dB(A) min in dB(A) Range in dB(A) Starting values
16 Hz 84
31,5 Hz 100
1 kHz 139
4 kHz 140
8 kHz 139
12,5 kHz 135
Table 4.3: Linear operating ranges A-weighted ( is the frequency of the sine signal) and starting values for the level linearity tests.
max in dB(C) min in dB(C) Range in dB(C) Starting values
16 Hz 126
31,5 Hz 137
1 kHz 139
4 kHz 139
8 kHz 137
12,5 kHz 133
Table 4.4: Linear operating ranges C-weighted ( is the frequency of the sine signal) and starting values for the level linearity tests.

4.3 Self-generated noise

The self-generated electrical noise of the device including preamplifier (measured with equivalent capaci-
Ω
tance and 50 at the input) amounts to approx. 16 dB(A) on the display. The acoustic noise is 16 dB. This
is a total noise level of 19 dB. The highest noise level may be expected when externally powered.

4.3.1 Measurement of low noise levels

For the measurement of low noise levels not special preparation is required.
ATTENTION!
SINUS Messtechnik GmbH
4.1 Level linearity range
in dB(A) L in dB(C)
AE Cpeak
ab 30 37. . . 140
30 54
30 70
25 114
30 110
30 109
30 105
41 85
42 95
39 100
38 101
39 98
38 95
Legally binding measurements must not be performed, if the device is con-
nected to public power supply.
74
84
94
94
94
94
94
94
94
94
94
94
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