Fig. 4 | Scientific Reports

Fig. 4

From: Acoustic features of music differentially modulate anxiety through EEG gamma oscillations and prefrontal connectivity

Fig. 4

Spectral characteristics of experimental tracks. (a–d) Spectrograms of the PA (a), PI (b), VA (c), and VI (d) experimental tracks averaged every 10 Hz. (e–f) Raincloud plots depicting power density of frequency (e) and roughness (f) between piano and violin pieces in the 4000–5000 Hz range. Each plot shows the distribution, boxplot, and all individual data points. Violin music exhibited significantly greater power density (Hedges’ g = 0.96) and roughness (Hedges’ g = 1.17) than piano music. Negative values occasionally observed in kernel density estimation were artifacts of smoothing; raw data points confirmed all measurements were non-negative.

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