Analysis of Galvanic Skin Response to Acoustic Stimuli by Wearable Devices

This paper evaluates the Galvanic Skin Response (GSR) signals to three different acoustic stimuli, collected through a commercial wearable device (Empatica E4) by a group of healthy individuals at rest. The collected GSR signals are analyzed depending on the overall number of peaks in the time domain, as well as on the Power Spectral Density (PSD) in the frequency domain, where three bands of interest are identified. In particular, the proposed paper aims to highlight features related to acoustic stimulation. The outcomes show that the GSR signal presents a higher number of GSR peaks in case of unpleasant and neutral stimuli than in case of pleasant stimulus. Moreover, a larger band than the bands typically considered in literature should be observed in the frequency domain, in order to include meaningful PSD of the GSR signal.