9 Operating and Measurements
Background Noise Example
056-652, Rev.D 1100/2100 SLM models
Background Noise Example
For example, if the background noise is 45 dB and the sound of interest measures
51 dB, the difference between measurement and background noise is 6 dB. From
Figure 4, for a 6 dB difference, 1.3 dB should be subtracted from the
measurement. The correct measurement is therefore 51 dB- 1.3 dB= 49.7 dB.
Figure 4: Effects of background noise
Windscreen Effects
To prevent measurement errors caused by wind blowing across the microphone,
the use of a windscreen is recommended. The wind screen will reduce wind
effects and will also help protect the microphone under dusty or oily conditions.
Acoustic attenuation effects of the WS-7 windscreen are
shown in Figure 5.
Figure 5: Effects of WS-7
To Next Page
Loading...
