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The influence of the spectral envelope of multi-tone sounds on loudness and preference of multi-tone sounds

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The sound character of multi-tone sounds yields a wide variety of perceptual aspects, which are quite different from those obtained from single tonal components. Particularly for a specific class of multi-tone sounds, consisting of two complex tones and additional combination tones, the perceptual effects of the temporal and the spectral sound characteristics are not yet clarified. This study addresses the effect of two signal parameters, which specify the spectral envelope of multi-tone sounds, on the loudness and the preference judgments. The signal parameters were the peak frequency and the falling slope of a triangular spectral envelope. The loudness and the preference effects were determined as levels at the points of subjective equality (PSEs) in two separate listening tests. The level difference between the PSEs for preference and for loudness is used as a quantitative measure, reflecting the additional influence of the sound character on the preference judgment. Clear relationships between the signal parameters and the judgments of loudness and preference were identified, especially for the difference measure between the PSEs. It turned out that the spectral signal variations can be effectively parameterized by the psychoacoustic sharpness and high correlation coefficients between the sharpness values and the judgments are found.

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Document Type: Research Article

Publication date: 21 August 2016

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