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  • 1.
    Engstrand, Olle
    et al.
    Stockholm University, Faculty of Humanities, Department of Linguistics, Phonetics.
    Traunmüller, HartmutStockholm University, Faculty of Humanities, Department of Linguistics, Phonetics.
    PERILUS V: Experiments in Speech Processes, Fall 1986 - Spring 19871987Collection (editor) (Other academic)
  • 2.
    Juvonen, Päivi
    Stockholm University.
    Den språkliga interaktionen under en språklektion1987Report (Other academic)
  • 3.
    Lacerda, Francisco
    Stockholm University, Faculty of Humanities, Department of Linguistics.
    Effects of peripheral auditory adaptation on the discrimination of speech sounds1987Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This study investigates perceptual effects of discharge rate adaptation in the auditory-nerve fibers.

    Discrimination tests showed that brief synthetic stimuli with stationary formants and periodic source were better discriminated when they had an abrupt as opposed to a gradual onset (non-adapted vs adapted condition). This effect was not observed for corresponding stimuli with noise source.

    Discrimination among synthetic /da/ stimuli (abrupt onsets) was worse than among /ad/ stimuli when the respective onset and offset frequencies of the second formant (F2) were varied. Similar results were obtained for /ba/ and /ab/. The low discrimination rate in consonant-vowel stimuli (CV) was explained in terms of sensory smearing of spectral information due to rapid formant transitions. Discrimination improved when the smearing effect was reduced by holding the onset formant pattern over a certain period of time of about 1 6ms. The relatively high discrimination score for the VC stimuli was explained by residual masking; extending the VC offset did not improve discrimination.

    Discrimination of place of articulation in CV syllables was examined in the light of sensory smearing. Two continua of /bu-du/ and /ba-da/ utterances were used in discrimination and identification experiments. It was observed that the discrimination peak for /Cu/ was displaced from the /b/-/d/ boundary, towards a flat F2 transition, suggesting that optimal place discrimination is related to the stability of the auditory representations generated at onset. This result is discussed in relation to current views of categorical perception.

  • 4.
    Svartholm, Kristina
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Relativsatser och andra konstruktioner i dövas skrivna svenska1987Book (Other academic)
  • 5.
    Svartholm, Kristina
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Subjekt och objekt i dövas skrivna svenska1987In: Aspects of Bilingualism: Proceedings from the Fourth Nordic Symposium on Bilingualism / [ed] Wande, E., Anward, J., Nordberg, B., Steensland L. & M. Thelander, Uppsala, 1987, 419-435 p.Conference paper (Other academic)
  • 6. Svartholm, Kristina
    Svenska för döva: Föredrag vid DHB:s representantskaps årsmöte, Härnösand den 24 okt 19871987In: DHB-Dialog, ISSN 0281-3106, no 4, 7-13 p.Article in journal (Other (popular science, discussion, etc.))
  • 7.
    Svartholm, Kristina
    et al.
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages.
    Wolf, Monica
    Svenska för vuxna barndomsdöva: Presentation av ett projekt1987In: Nordisk tidskrift för hörsel- och dövundervisning NTD, ISSN 1651-6036, no 2, 115-116 p.Article in journal (Other (popular science, discussion, etc.))
  • 8.
    Traunmüller, Hartmut
    Stockholm University, Faculty of Humanities, Department of Linguistics.
    Phase vowels1987In: The psychophysics of speech perception: Proceedings of the NATO advanced research workshop on "The psychophysics of speech perception" / [ed] M.E.H. Schouten, Dordrecht: Nijhoff in cooperation with NATO Scientific Affairs Division , 1987, 377-384 p.Conference paper (Other academic)
  • 9.
    Traunmüller, Hartmut
    Stockholm University, Faculty of Humanities, Department of Linguistics. Fonetik.
    Some aspects of the sound of speech sounds1987In: The Psychophysics of Speech Perception, Martinus Nijhoff Publishers, Dordrecht , 1987, 293-305 p.Chapter in book (Other academic)
  • 10.
    Traunmüller, Hartmut
    et al.
    Stockholm University, Faculty of Humanities, Department of Linguistics, Phonetics.
    Lacerda, Francisco
    Stockholm University, Faculty of Humanities, Department of Linguistics, Phonetics.
    Perceptual relativity in identification of two-formant vowels1987In: Speech Communication, ISSN 0167-6393, E-ISSN 1872-7182, Vol. 6, no 2, 143-157 p.Article in journal (Refereed)
    Abstract [en]

    It is attempted to reduce the phonetic quality of vowels to the positions of the peaks in their tonotopical spectra relative to the other peaks, simultaneous or preceding in context. Synthetic two-formant vowels were identified by speakers of languages that differentiate richly among high vowels (Swedish, Turkish). The parameters F1 (204-801 Hz) and F2' (509-3702 Hz) were systematically varied in steps of 0.75 critical bandwidth. F0 was kept close below F1 in all vowels. These were presented in two orders with subsequently rising or falling F2'. Most subjects heard predominantly close vowels. The "isophones" of most subjects could be described in a uniform manner implying a normalization with respect to two reference points, one at a distance of 3 critical bands above F0 and the other one at an absolute position corresponding to 2.8 kHz. It is speculated that this second reference point might represent a default position of the third formant or the like.

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