This paper investigates loudness fluctuations in the critical band centered near 345 Hz (Bark scale band 7), examining the “Top” percentile (N5) of loudness distribution for non-stationary sounds. Using ISO 532-1 (Zwicker method) and -2 (time-varying), we analyze how spectral energy around 345 Hz influences overall perceived loudness in sones. Results indicate that the 345 Hz region contributes disproportionately to top-percentile loudness due to its proximity to the first formant frequency of many voiced sounds.
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