Search for dissertations about: "Sound generation"

Showing result 16 - 20 of 64 swedish dissertations containing the words Sound generation.

  2. 16. Squeak and Rattle Prediction for Robust Product Development in the automotive industry

    Author : Mohsen Bayani; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; structural dynamics; finite element analysis; product development; squeak and rattle; sound quality; simulation;

    Abstract : Squeak and rattle are nonstationary, irregular, and impulsive sounds that are audible inside the car cabin. For decades, customer complaints about squeak and rattle have been, and still are, among the top quality issues in the automotive industry. READ MORE

  4. 17. Modelling the Production and Propagation of Sound in Individual Human Vocal Tracts

    Author : Lukas Schickhofer; Mihai Mihaescu; Anders Dahlkild; Manfred Kaltenbacher; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomechanics; Vocal Tract Acoustics; Numerical Flow Simulation; Fluid-Structure Interaction;

    Abstract : Voice generation and the expression through speech are of vital importance for communication. The human upper airways are the origin of the process of speech production, which involves a modulation of the periodically pulsed pressure from the lungs by the vocal tract volume. READ MORE

  5. 18. Sound generation in metal flue organ pipes: On the influence of asymmetric flue exit geometry and vibrations of the upper labium with particular emphasis on the early response

    Author : Matthias Scholz; Chalmers tekniska högskola; []
    Keywords : jet contraction; wall vibrations; CFD; jet velocity profile; tap tone; asymmetry of flue exits; operational deflection shapes; Coanda effect; yielding upper labium; modal analysis; bottom clamped cylinder; vibration measurements; metal flue organ pipes; dipole; initial jet formation;

    Abstract : Sound generation in flue organ pipes is caused by the non-linear interaction between an instable jet and a tube resonator. Our understanding of this very complex physical process is still incomplete, and there is not yet a model that can explain all details of the richness in pipe sound which can be achieved by a trained organ pipe voicer. READ MORE

  6. 19. Applicable directivity description of railway noise sources

    Author : Xuetao Zhang; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; directivity; the Doppler factor; scattered fluid sound; railway noise; perpendicular dipole pair;

    Abstract : For a sound source, directivity is an important parameter to specify. This parameter also reflects the physical feature of the sound generation mechanism. For example, turbulence sound is of quadrupole directivity whilst fluid-structure interaction often induces a sound of dipole characteristic. READ MORE

  7. 20. Lexical and Acoustic Modelling of Swedish Prosody

    Author : Johan Frid; Fonetik; []
    Keywords : HUMANIORA; HUMANITIES; phonology; Phonetics; stress; dialects; Swedish; word accents; letter-to-sound; text-to-speech; modelling; intonation; prosody; speech technology; Fonetik; fonologi; Scandinavian languages and literature; Nordiska språk språk och litteratur ;

    Abstract : Prosody and intonation are very important ingredients of human speech. In speech technology, text-to-speech (TTS) and automatic speech recognition (ASR) systems must incorporate prosodic models in order to reach acceptable performances. READ MORE