Figure 1 | Scientific Reports

Figure 1

From: Evaluation of emotional arousal level and depression severity using voice-derived sound pressure change acceleration

Figure 1

(a) Direction of acceleration. Note: Acceleration toward the center is positive, and acceleration away from the center is negative. (b) Acceleration for rough waveform. Note: The more the waveform crosses the centerline, the greater the proportion of acceleration towards the center. (c) Waveform when there is a bias between two adjacent velocity vectors. Note: When the absolute values \(\left| {v\left( t \right)} \right|\) and \(\left| {v\left( {t + 1} \right)} \right|\) of two adjacent velocity vectors differ greatly, the entire waveform tends to be smooth.

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