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 27 for “"Sound Quality"”.
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Sound Quality Analysis of Sewing Machines
Sound quality analysis is a tool designed to help determine customer preferences, which can be used to help the designer improve product quality. Many industries desire to know how the consuming public perceives their product, as this affects the product life and success. This research investigates …
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An investigation of sound quality of I.C. engines
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Development and validation of a laminate flooring system sound quality test method
… received negative feedback from customers on the sound quality of laminate flooring installations. Customers express a preference for the sound of traditional hardwood floors over that of laminate flooring composites. Consumers notice a difference between the sounds created by a footfall between …
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A new method for measuring and calibrating cinema audio systems for optimal sound quality
The aim of this research is to utilize new methodologies and technology in order to gain insight into how the modern cinema audio system could be calibrated to provide improved audio performance. To this end, both objective and subjective measurements were developed to better understand the audio …
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Sound Synthesis Using Programmable System-On-Chip Devices
… available. They are perceived to be of superior sound quality by users, but their primary drawback is price, as numerous discrete components or specialist integrated circuits are required. This thesis introduces two novel low-cost approaches to building analogue-type synthesisers. Such a low-cost …
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An Integrated Magnetoencephalographic and Functional Magnetic Resonance Imaging Study on Temporal Asymmetry Processing in the Human Auditory Cortex
… is used to modulate a sinusoid, it reduces the sound quality typically associated with the carrier. When the modulator is reversed in time, producing a "ramped" sound, the sound quality of the carrier is more salient. Magnetoencephalography was used in conjunction with functional magnetic …
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Singing voice analysis/synthesis
… can. As listeners, we are innately drawn to the sound of the human voice, and when present it is almost always the focal point of a musical piece. But the acoustic flexibility of the voice in intimating words, shaping phrases, and conveying emotion also makes it the most difficult instrument to …
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Enhancing voice pitch perception in cochlear implants
… pitch cues without disrupting intelligibility or sound quality. The proposed strategies are adapted from the F0Mod strategy and are designed not only to enhance pitch but also to determine important characteristics of pitch presentation for the design of future processing strategies. The results …
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Experimental and Computational Methods for Investigating Automotive Door Closure Sounds
… speeds were 0.851m/s and 1.179m/s. Transient sound pressure measurements from five different door closure mechanisms were collected in a semi-anechoic chamber using a three-element condenser microphone array. Post-processing methodologies such as Sound Pressure Level versus 1/3 Octave …
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Noise reduction schemes for digital hearing aids and their use for the hearing impaired
… subjects show that besides better 'sound quality', most obvious benefits are reductions in the mental effort needed to listen to speech in noise. To assess this feature, a listening effort test is developed. For further subjective quality assessment of the algorithms, the method of …
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An analytical and comparative study of Francisco Tarrega's two volumes of guitar studies : volume one : thirty elementary level studies and volume two : twenty-five intermediate and advanced level studies
… right- and lefthand finger movements, and sound quality are first discussed in this study. Then, the fiftyfive guitar studies are discussed and analyzed in groups according to their different technical purposes, such as scale playing, arpeggio playing, blocked chords, barré technique, slur …
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CODA - Determining the sounding chamber
… not yet publicly identified of the site, sound quality of the pedestrian experience in a high traffic environment. Studies show increased health problems of residents living in close proximity to high traffic environments. The goal of this research is to determine the best design …
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Unsupervised segmentation of heart sounds
Digitized and recorded heart sounds contain significant diagnostic information, and are easily acquired in clinical practice. Part of a hypothetical diagnostic system is the segmentation subsystem which locates the boundaries between heartbeats. This thesis examines the design and performance of …
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Synchronous Sampling Sideband Orders from Helical Planetary Gear Sets
… sidebands have been found to produce a poor sound quality, resulting in customer dissatisfaction and warranty returns. In the interest of continued product improvement, research and development must resolve uncertainties in the current design methods. Qualitative relationships between the …
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Pedagogical methods of Vincent Cichowicz as witnessed by Larry Black, 1964-1966: a case study
… data indicates that Cichowicz prioritized sound quality over musical complexity, believed that music of minimum difficulty would yield maximum progress, and stood by these convictions even in the face of time-sensitive issues such as performances or auditions. Black's curriculum represents …
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Adaptive watermarking algorithms for MP3 compressed audio signals
… digital music with high ratio while keeping high sound quality. However, copyright issue is raised because of illegal copy, redistribution and various malicious attacks. Digital watermarking is a technology that allows users to embed some imperceptible data into digital contents such as image, …
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Nuair a bha Gaidhlig aig na h-eoin : an investigation into the art and artifice of avifaunal mimesis as a mode of artistic expression in Gaelic oral culture from the seventeenth century to the present
… for the purposes of emulating a particular sound quality pertinent to an individual species or natural phenomenon, such as the call of the seal or the breaking of waves. The most common of these, however, imitate birds. For the purposes of this analysis, imitation is understood to mean both …
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A Distortion Suppression Technique for a Digital Class D Audio Power Amplifier with Pulse Density Modulation
… to keep up with growing demands for high sound quality and improved power efficiency. Low power audio amplifiers for mobile phones and MP3 players, and high power amplifiers for portable speakers require high power efficiency and superior audio quality. The compact design of portable …
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Towards perceptual metrics for audio quality assessment
… insights with respect to the generated audio quality. This dissertation work focuses on: 1. Investigating how effective contemporary metrics are at capturing the audio quality of sounds generated from NAS systems, 2. Assessing the behavior of popularly used embedding distance measures and the …
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