Sökning: "Perceptual Features"

Visar resultat 16 - 20 av 39 avhandlingar innehållade orden Perceptual Features.

  1. 16. Guided by Fear : Effects on attention and awareness

    Detta är en avhandling från Stockholm : Department of Psychology, Stockholm University

    Författare :Nathalie Peira; Stefan Wiens; Nazanin Derakhshan; [2010]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Emotion; fear; attention; awareness; affective processing; heart rate; skin conductance; SOCIAL SCIENCES Social sciences Psychology; SAMHÄLLSVETENSKAP Socialvetenskap Psykologi; psykologi; Psychology;

    Sammanfattning : Because the visual system has limited capacity, emotions such as fear may play an important role in guiding the selection of relevant input (LeDoux, 2000; Öhman & Mineka, 2001). The aim of the current thesis was to investigate how fear can guide the organism by influencing:  (I) attentional processes, (II) awareness of the visual input, and (III) affective processing independent of awareness. LÄS MER

  2. 17. The acquisition of contrast a longitudinal investigation of initial s+plosive cluster development in Swedish children

    Detta är en avhandling från Umeå : Filosofi och lingvistik

    Författare :Fredrik Karlsson; Kirk P. H. Sullivan; Peter E. Czigler; Marilyn M. Vihman; [2006]
    Nyckelord :HUMANIORA; HUMANITIES; phonological contrast; speech development; place and manner of articulation; aspiration; structural complexity; acoustic cues; homonym production; HUMANITIES and RELIGION Languages and linguistics Linguistic subjects Phonetics; HUMANIORA och RELIGIONSVETENSKAP Språkvetenskap Lingvistikämnen Fonetik;

    Sammanfattning : This Thesis explores the development of word-initial s+plosive consonant clusters in the speech of Swedish children between the ages of 1;6 and 4;6. Development in the word-initial consonant clusters is viewed as being determined by 1) the children’s ability to articulate the target sequence of consonants, 2) the level of understanding of which acoustic features in the adult model production are significant for the signalling of the intended distinction, and 3) the children’s ability to apply established production patterns only to productions where the acquired feature agrees with the adult target, to achieve a contrast between rival output forms. LÄS MER

  3. 18. Forensic comparison of voices, speech and speakers : tools and methods in forensic phonetics

    Detta är en avhandling från Gothenburg : Department of Philosophy, Linguistics, and Theory of Science, University of Gothenburg

    Författare :Jonas Lindh; Göteborgs universitet.; Gothenburg University.; [2017]
    Nyckelord :HUMANIORA; HUMANITIES; forensic phonetics; automatic voice recognition; disputed utterance; speech; language technology; phonetics;

    Sammanfattning : This thesis has three main objectives. The first objective (A) includes Study I, which investigates the parameter fundamental frequency (F0) and its robustness in different acoustic contexts by using different measures. LÄS MER

  4. 19. Towards flexible audio coding

    Detta är en avhandling från Stockholm : Signaler, sensorer och system

    Författare :Renat Vafin; Bastiaan Kleijn; Juergen Herre; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Audio coding; multistage coding; waveform coding; parametric coding; sinusoidal coding; Elektronik; TECHNOLOGY Electrical engineering; electronics and photonics Electronics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektronik;

    Sammanfattning : thesis is about audio coding and improving flexibility thereof. Audio coding is used to reduce the bit rate needed to represent audio signals in digital format. When the available bit rate is low, parametric coding methods that use models to describe perceptually-important features of audio signals have shown their efficiency. LÄS MER

  5. 20. Distribution Preserving Quantization

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Minyue Li; W. Bastiaan Kleijn; Jan Østergaard; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Sammanfattning : In the lossy coding of perceptually relevant signals, such as sound and images, the ultimate goal is to achieve good perceived quality of the reconstructed signal, under a constraint on the bit-rate. Conventional methodologies focus either on a rate-distortion optimization or on the preservation of signal features. LÄS MER