Figure 2From: The automatic recognition and counting of coughSound 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.Back to article page