Supporting Information: Cross-Country Variation in Psychophysiological Responses to Traffic Noise Exposure: A Laboratory Experiments in India and the UK

This Supporting Information summarizes the methods for processing psychoacoustic parameters and psychophysiological signals, detailing the clustering of noise stimuli into silent, active, and loud categories. It also covers the extraction of heart rate variability (HRV) and skin conductance response (SCR) features and the statistical tests used to compare changes in these signals between Indian and British groups across different noise clusters.