Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"sound generation"”.
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Underwater communication via compact mechanical sound generation
… line of sight between the source and detector. Sound can also be used as a communication method, and has many advantages. It can propagate long distances underwater and does not require line of sight to work effectively. However, generating sound electronically underwater requires a large power …
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Fluid flow and sound generation at hydrothermal vent fields
… acoustic source mechanisms capable of producing sound at levels higher than ambient ocean noise. Pressure levels and frequency generated by hydrothermal jets are dependent on chimney dimensions, fluid velocity and temperature and therefore can be used to monitor changes in these parameters over …
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Fluid flow and sound generation at hydrothermal vent fields
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988.
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Soundgen : a Web services based sound generation system for the psychoacoustics laboratory
Soundgen is a web services based sound generation system developed for the MIT Psychoacoustics Laboratory Course 6.I82. The sounds created by Soundgen are combinations of various tones and noises, produced by a dedicated server running Linux, MATLAB, Apache, and PHP. As an example, Soundgen can …
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Thermophony in real gases
A thermophone is an electrical device for sound generation. The advantages of thermophones over conventional sound transducers such as electromagnetic, electrostatic or piezoelectric transducers are their operational principle which does not require any moving parts, their resonance-free behavior, …
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Optical turntable as an interface for musical performance
… the elements of programming, graphics, sound generation, and physical interaction. An interface for manipulating these elements is suggested, based on the concept of a disk-jockey turntable as a performance instrument. A system is developed around this idea, enabling optical pickup of …
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Numerical techniques for computational aeroacoustics
… is based on direct numerical simulation of the sound field. In the region of sound generation, the unsteady airflow is computed separately from the sound using Computational Fluid Dynamics (CFD) codes. Overlapping this region and extending further away is the acoustic domain where the linearised …
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Ultraschallerzeugende Mikrostrukturen für batterielose Fernbedienungen
… without elaborate electronic equipment, ultrasound can be produced mechanically with relatively simple components. Therefore it seemed expedient to fall back on ultrasound, which was used in the first wireless remote controls, and to further develop this technology. For this purpose, the sound …
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The Emonator : a novel musical interface
… analyzed and used to control several music and sound generation engines as well as video streams in real-time. The Emonator is an interesting musical experience for both amateur and professional musicians. It is also versatile, working well as a stand-alone interface or as part of a larger …
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Large-area lightweight organic photovoltaics
… sensing, computing, lighting, energy-harvesting, sound generation, etc. Critical to this would be availability of manufacturing techniques amenable for large-area coverage and material sets with sufficient mechanical resilience to withstand day-to-day human handling. Herein, we present …
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Anwendung des Lattice-Boltzmann-Verfahrens zur Berechnung strömungsakustischer Probleme
… the first part of this study the description of sound wave propagation by common variants of the Lattice-Boltzmann-model is examined by calculation of phase velocity and effective viscosity for sound waves. Schemes with nine velocities in two dimensions and nineteen velocities in three dimensions …
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System Level Approach towards Intelligent Healthcare Environment
… validated. Finally, the thermo-acoustic sound generation mechanism using CNT sheets was investigated with the goal of developing techniques for acoustic localization of WCE and customized sound generation devices. CNT thermo-acoustic projectors were modeled and experimentally …
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Interaction Design for Digital Musical Instruments
… composed of a separate control interface and a sound generation system that exchange information. When designing the way in which a digital musical instrument responds to the actions of a performer, we are creating a layer of interactive behaviour that is abstracted from the physical controls. …
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Active Flow Control For Reduction of Unsteady Stator-Rotor Interaction In a Turbofan Simulator
… trailing edge blowing managements in the tonal sound generation.
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Combined-channel instantaneous frequency analysis for audio source separation based on comodulation
… have a remarkable ability to focus on a single sound or speaker of interest and to block out competing sound sources. Individuals with hearing impairments, on the other hand, often experience great difficulty in noisy environments. The goal of our research is to develop novel signal processing …
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Die Geräuschqualität bei der Anfahrt elektrischer Schienenfahrzeuge
In recent years, sound quality has been established as important field of research. Many publications are focused on the evaluation of sounds, i.e. by means of listening tests or instrumental quantities. A deeper understanding of technical effects, however, is also necessary in this context, since …
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Physical modeling of the singing voice
… the parts of the voice organ relevant for voice generation plus techniques for the measurement of acoustic voice properties. An introduction to characteristics of the voice signal is followed by a literature survey of existing approaches for the most important functional voice components. …
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Ambient noise and surface wave dissipation in the ocean
There is a growing consensus that the sound generated by breaking waves is responsible for much of the ambient noise level in the ocean. While numerous field measurements have shown a strong correlation between the ambient noise spectrum level (N) in the range 100Hz to 25kHz and wind speed in the …
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Biomimetic Agent-Based Modeling in Musical Interface Design: Ecological Dynamics, Care, and Constraint in a Physarum-Inspired Musical Instrument
… in computer music addresses models' role in sound generation, an equally important question concerns their role in structuring performer interaction. The thesis argues that Döbereiner's framework distinguishing standard from nonstandard synthesis can be extended to interface design: just as …
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