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- Traunmüller, Hartmut
(author)
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Die spektrale Auflösung bei der Wahrnehmung der Klangfarbe von Vokalen
- 1984
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In: Acta Acoustica united with Acustica. - 1610-1928 .- 1861-9959. ; 54, s. 237-246
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Journal article (peer-reviewed)abstract
- The distances between neighbouring partials of vowels are in many cases larger than the bendwidths of the formants and also often larger than the critical bandwidth (1 Bark). Several results of different experiments with synthetic one- and two-formant vowels suggest that an efficient bandwidth of resolution of roughly 3 Bark is basic to the perception of spectral features of vowels. A corresponding spectral dispersion or integration did not, however, appear in experiments with non-speech harmonic sounds. K. Benedini investigated the timbre differences between harmonic sounds with up to six harmonics of 100 Hz. An analysis of the estimated timbre differences shows that both the bandwidth of resolution and the perceptual weight of the partials is proportional to their frequency. The weight of the fundamental is, however, substantially increased in comparisons between residual and complete harmonic sounds. Further, the perceived difference between two sounds turns out to be dependent on the remaining sounds presented in a perceptual experiment. The timbre differences between low-passed harmonic sounds of different width can be accounted for exclusively on the basis of the tono-topical distances between the upper flanks of these sounds. It is concluded that the judgement of differences in timble involves the prior extraction, induced by context, of relevant dimensions. The bandwidth of spectral resolution that appears with the perception of vowel-like sounds may in part be due to an intrincsic inacuity to the phonetic templates supposedly stored in memory.
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