Search for dissertations about: "Helmholtz motion"
Showing result 1 - 5 of 7 swedish dissertations containing the words Helmholtz motion.
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1. The bowed string
Abstract : Of the many waveforms the bowed string can assume, theso-called "Helmholtz motion" (Helmholtz 1862) gives the fullestsound in terms of power and overtone richness. The developmentof this steady-state oscillation pattern can take manydifferent paths, most of which would include noise caused bystick-slip irregularities of the bow-string contact. READ MORE
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2. Development of Helmholtz motion and related wave patterns in the bowed string
Abstract : Of the many wave patterns that the bowed string is capableof producing, the so-calledHelmholtz motion(Helmholtz 1862) gives the fullest sound in terms of power andovertone richness. Papers one and two of this thesis deal withthe creation of this particular string movement: The firstpaper, based on computer analysis, describes some systemparametersinfluence on the transient in terms ofplayability. READ MORE
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3. Mechanics and acoustics of violin bowing : Freedom, constraints and control in performance
Abstract : This thesis addresses sound production in bowed-string instruments from two perspectives: the physics of the bowed string, and bow control in performance. Violin performance is characterized by an intimate connection between the player and the instrument, allowing for a continuous control of the sound via the main bowing parameters (bow velocity, bow force and bow-bridge distance), but imposing constraints as well. READ MORE
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4. On the control of virtual violins : Physical modelling and control of bowed string instruments
Abstract : This thesis treats the control of sound synthesis of bowed string instruments based on physical modelling. The work followed two approaches: (a) a systematic exploration of the influence of control parameters (bow force, bow velocity, and bow-bridge distance) on the output of a physical model of the violin, and (b) measurements and analyses of the bowing parameters in real violin playing in order to model and parameterize basic classes of bowing patterns for synthesis control. READ MORE
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5. Wave Modelling Techniques for Medium and High Frequency Vibroacoustic Analysis Including Porous Materials
Abstract : Numerical methods based on wave modelling are explored for the vibroacoustic analysis of wave propagation, sound transmission and interior noise in vehicles and buildings at medium and high frequencies. The presence of sound absorbing porous materials in practical engineering structures is also considered. READ MORE