Sound Quality Evaluation System - Frequently Asked Questions

The comparison of sound quality evaluation metrics for "door closing sound" listed in the catalog is basically based on examples of different car models, and evaluates aspects such as "heavy sound" and "light sound" based on loudness, sharpness, and their temporal variation patterns to match the listener's perception.
Whether subtle variations due to production variability can be evaluated is something that can only be determined by actually trying it, but if the average person (not a trained examiner) can hear the difference, then it should be possible to make some comparisons.