Sökning: "auditory models"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden auditory models.

  1. 1. Perceptual and Squared Error Aspects in Speech and Audio Coding

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

    Författare :Harald Pobloth; Bastiaan Kleijn; Gernot Kubin; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; speech coding; audio coding; auditory models; perceptual distortion measures; squared error; Signalbehandling; TECHNOLOGY Information technology Signal processing; TEKNIKVETENSKAP Informationsteknik Signalbehandling;

    Sammanfattning : In the process of quantization, speech and audio signals are changed. This thesis contains four papers concerned with comparing and minimizing different measures to quantify the changes introduced. Before quantization the signal can be transformed to another domain. Transforms related to the discrete Fourier transform allow for e. LÄS MER

  2. 2. Perceptually motivated speech recognition and mispronunciation detection

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

    Författare :Christos Koniaris; Olov Engwall; Martin Cooke; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; feature extraction; feature selection; auditory models; MFCCs; speech recognition; distortion measures; perturbation analysis; psychoacoustics; human perception; sensitivity matrix; pronunciation error detection; phoneme; second language; perceptual assessment;

    Sammanfattning : This doctoral thesis is the result of a research effort performed in two fields of speech technology, i.e., speech recognition and mispronunciation detection. Although the two areas are clearly distinguishable, the proposed approaches share a common hypothesis based on psychoacoustic processing of speech signals. LÄS MER

  3. 3. Probabilistic Modelling of Hearing Speech Recognition and Optimal Audiometry

    Detta är en avhandling från Stockholm : KTH

    Författare :Svante Stadler; Arne Leijon; Stefan Stenfelt; [2009]
    Nyckelord :auditory models; probabilistic modelling; speech modelling; human speech recognition; hearing aids; cochlear implants; psychoacoustics; diagnostic methods; optimal experiments; audiometry;

    Sammanfattning : Hearing loss afflicts as many as 10\% of our population.Fortunately, technologies designed to alleviate the effects ofhearing loss are improving rapidly, including cochlear implantsand the increasing computing power of digital hearing aids. Thisthesis focuses on theoretically sound methods for improvinghearing aid technology. LÄS MER

  4. 4. Prevention - and intervention therapies in auditory trauma

    Detta är en avhandling från Stockholm : Karolinska Institutet, Department of Clinical Neuroscience

    Författare :Anette Fransson; Karolinska Institutet.; Karolinska Institutet.; [2009]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Hearing impairment is one of the most common health conditions in developed countries. It is estimated that approximately 70 million people worldwide are deaf. For patients with a severe to profound hearing loss a cochlear implant (CI) is the only treatment today. LÄS MER

  5. 5. The diagnosis and protection of the auditory peripheral system

    Detta är en avhandling från Stockholm : Karolinska Institutet, Department of Physiology and Pharmacology

    Författare :Mao Li Duan; Karolinska Institutet.; Karolinska Institutet.; [1999]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cochlea; inner hair cell; outer hair cell; glutamate; post-synaptic receptor; auditory brainstem response; forward masking; noise trauma; hearing loss;

    Sammanfattning : The main focus of this thesis is on the diagnosis and prevention of peripheral hearing loss. An auditory evoked response measure (forward masking) was developed that specifically tests the function of the inner hair cells, independently of the outer hair cells. LÄS MER