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 59 for “"loudspeaker"”.
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Electrostatic loudspeaker design
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1959.
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The aperiodically dampened loudspeaker system
The theory of the aperiodically damped loudspeaker system is derived and investigated in both the time and frequency domains. The advantages of the aperiodic configuration over sealed box loudspeaker systems are discussed. The aperiodically damped loudspeaker system is described by the parameters …
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A direct PWM loudspeaker feedback system
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Characterisation and modelling of loudspeaker cone resonance
Loudspeaker cone resonance (“cone break-up”) is a fundamental cause of ripple in the electrical impedance and sound pressure responses of electrodynamic loudspeakers. In this thesis, the dependence of the characteristics of loudspeaker cone resonances on the material properties and thickness …
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Temperature and humidity effects on loudspeaker cone performance
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1981.
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Derivation of Moving-Coil Loudspeaker Parameters Using Plane Wave Tube Techniques
<p>Small-signal moving-coil loudspeaker driver parameters are traditionally derived through electrical impedance measurement techniques. These parameters are commonly called Thiele/Small parameters, after Neville Thiele and Richard Small who are credited with developing industry-standard …
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Quantification of the performance of 3D sound field reconstruction algorithms using high-density loudspeaker arrays and 3rd order sound field microphone measurements
… the spatialization and the development of the loudspeaker arrays are some of the greatest challenges. In this thesis, these challenges for improving immersive audio will be explored. First, there will be a short introduction about 3D audio and a review about the state of the art technology and …
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Simulation and analysis of spatial audio reproduction and listening area effects
Loudspeaker-based spatial audio systems are often designed with the aim to create an auditory event or scene to a listener positioned in the optimal listening position. However, in real-world domestic listening environments, listeners can be distributed across the listening area. Any translational …
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Acoustic Devices for the Active & Passive Control of Sound in a Payload Compartment
… devices such as Helmholtz resonators and loudspeakers used for noise control in rocket payload compartments are developed. Second, active control using a hybrid control system (with structural and acoustic actuators) was tested experimentally. Due to the weight limitations for this …
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Development and Evaluation of a Hybrid Wind Instrument
… the present thesis, the possibility of using a loudspeaker to supply the calculated excitation signal is evaluated; the loudspeaker is placed at the entrance of the resonator (a clarinet-like tube), along with a microphone. This work focusses particularly on two possibilities: using the …
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Sound field reproduction
… a desired sound field with an array of loudspeakers. A theory based on functional analysis and the theory of<br/>integral equations is developed for the study of this problem. An attempt is made to develop a mathematical framework that can be adopted as a generalized theory of sound …
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Spatial sound and sound localization on a horizontal surface for use with interactive surface (tabletop) computers
… respect to audio interaction including: "What loudspeaker constellations are appropriate for tabletop computers?" "How does our perception of spatial sound change with these different loudspeaker configurations?" and "What panning methods should be used to maximally use the spatial localization …
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Acoustic energy harvesting with emphasis on low frequencies
… proof - of - concept case, this study focuses on loudspeaker enclosures since the sound pressure level (SPL) therein can be significantly high during operation, as it is shown via tests performed for realistic 3D virtual prototype models, which are validated also via measurements performed inside …
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Signal processing in a loudspeaking telephone
… in the duplex LST to cancel coupling between the loudspeaker and microphone, and across the transmit to receive paths of the 2-to-4-wire converter. Normal movement of a person in the acoustic path causes a loss of stability by increasing the level of coupling from the loudspeaker to the …
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Object-based radio : effects on production and audience experience
… across five different genres and four different loudspeaker layouts. It shows that there is no clustering of listeners based on their preference of foreground vs background balances. It also shows that there is significant variation of foreground and background balance preference between …
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Vibration Extraction Using Rolling Shutter Cameras
… test our method by controlled experiments with a loudspeaker. We play sounds with certain frequency components and take videos of the loudspeaker's surface. Our approach recovers chirp signals as well as single frequency signals from rolling shutter videos. We also test with music and speech. Both …
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The sounds of displacement : a portfolio of binaural compositions
… reproduction but also for multi-channel loudspeaker concert diffusion. The commentary traverses the programmatic and aesthetic considerations involved in the construction of the portfolio and the influence of the in-ear binaural method of recording and reproduction thereof. The spectral …
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Development and Comparison of Highly Directional Loudspeakers
Highly directive loudspeakers have long been important tools for sound system designers, experimental acousticians, and many other professionals in the audio industry. They allow sound engineers to more easily manipulate the radiation pattern of their loudspeakers to accommodate the purpose of the …
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