ARGIRA Experiment 8: Robustness of Visual–Acoustic Correspondence Across Roughness Thresholds
Authors/Creators
Description
This record contains the materials for ARGIRA Experiment 8, a sensitivity analysis evaluating how the choice of acoustic roughness threshold affects the observed correspondence between image chromaticity and sonified acoustic structure.
Using the complete ARGIRA v3 corpus (69 valid images after preprocessing), three sonification pipelines were compared:
• Naive deterministic mapping
• OPRS (Order-Preserved Random Spacing)
• RTR (Random Total Randomization)
Roughness was computed using multiple cutoff frequencies (500, 750, 1000, 1250, 1500, 1750 and 2000 Hz). Pearson and Spearman correlations between hue dispersion (hue_std) and acoustic roughness were evaluated for each threshold.
The principal result is that the ordering observed in previous experiments (Naive > OPRS > RTR) remains stable across a broad interval of thresholds (1000–1750 Hz), indicating that the visual–acoustic correspondence identified in ARGIRA is not an artifact of a single arbitrarily selected roughness cutoff.
Included files:
• Experiment 8 report (PDF)
• Source code used to generate the analysis
• CSV file containing threshold sensitivity results
License: CC BY-NC 4.0
Author: Jose Ranero Garcia
Project: ARGIRA (Artificial Reconstruction of Images through Acoustic Analysis)
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