PERCEPTUAL SIMILARITY OF 60 SPEECH-LIKE SOUNDS.
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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The study required listeners to assess the perceptual difference between two aural events. Other studies have required judgments of the similarity of real speech language. The present stimuli were speech-like in at least temporal properties, quality, and pitch. Twelve speakers participated in saying pairs of syllables with about the same stress. The backward played syllables retrained the pitch, timbre, duration, and the level of the syllables. Otherwise it was gibberish and scarcely appropriate for categorizing into phonemes. None of the listeners was aware at the time that the stimuli were barkward-played speech. None of the listeners had any background in phonetics. Two syllabic bursts had a relative degree of alikeness on a similarity-dissimilarity scale, subjectively determined. The relative similarity among 60 comparisions tended to be ordered alike by 15 judges, working independently. Further analyses showed that the rankings of the noises in terms of their similarity tended to agree with other rankings of the stimuli when they had been reproduced as phonemic syllables and judged in the manner of the present judgments. The positive degrees of consensus among the listeners in judging both syllables and noises suggest the applicability of the method of magnitude estimation to auditory phenomena, including phonemic ones. Author
- Non-Radio Communications