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Figure 2 | Cough

Figure 2

From: The automatic recognition and counting of cough

Figure 2

Sound detection. The top graph shows the original sound signal. In the bottom graph depicts σsignal and the two baseline threshold lines in which threshpeak = 10 and threshlimits = 1.5. Point 2(a) indicates the first standard deviation larger than threshpeak × σbackground. Points 2(b) and 2(c) are the points nearest to point 2(a) where σsignal is smaller than threshlimits × σbackground. The whole region between points 2(b) and 2(c) is a sound event. In the same way, the region between points 2(d) and 2(e) will be detected as a sound event.

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