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 14 of 14 for “"acoustic measurement"”.
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Automatic acoustic measurement optimization for segmental speech recognition
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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High Resolution Acoustic Measurements of Musical Instruments
… work undertaken while carrying out research into acoustic measurement techniques for 3-dimensional acoustic radiation data for musical instruments, specifically when the instruments are being played by musicians. The original contribution to knowledge that is presented includes the development of …
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Non-invasive assessment of bacterial biofilm in the middle ear using low-coherence interferometry/optical coherence tomography and acoustic measurements
… (LCI)/optical coherent tomography (OCT) and acoustic measurements. Portable systems were constructed by integrating LCI/OCT techniques with a standard video otoscope to provide depth-resolved optical scattering properties of the middle ear. An automatic algorithm was written to classify the …
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Investigation of defects on acoustic scattering in cloak by molding process
… was developed in order to replicate the acoustic cloak. The metal was cast into a stretchable PDMS mold, which was cast from micromachined aluminum cloak. For the PDMS mold, the mold release agent, trichlorosilane ([tridecafluoro-1,1,2,2-tetrahydrooctyl] trichlorosilane), was enhanced to …
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A comparison of logging while drilling (LWD) and wireline acoustic measurements
The instruments used to measure borehole acoustic data can be classified as either wireline or logging while drilling (LWD). The wireline tool measures formation speeds after the borehole is drilled, and the LWD tool measures formation speeds while the borehole is drilled. This thesis focuses on …
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Correspondence Patterns and Perceptual Distance of Consonants Between Southern Min and Cantonese
… between Cantonese and Southern Min. An acoustic measurement and comparison of oral stops between Cantonese and Southern Min is included as well to help us understand more of the results of the perceptual distance experiment. The results of the experiment help us refine the calculation of …
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Kinematic Modeling of Asymmetric Vocal Fold Vibration
… changes in the glottal area, flow, and acoustic waveforms, and subsequently a perceived breathy voice quality. The purpose of this project was threefold: 1) to determine how specific vocal fold structural and vibratory asymmetries alter vocal function and perceived voice quality, 2) to …
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A novel framework for acoustic diagnostic of artificial lift system for oil-production
… a finite set of measurables at the top. A novel acoustic-based diagnostic method is put forward as an enabler for determining the downhole conditions. It consists of reconstructing the pressure signal generated by the pump from an acoustic measurement made at the top. Knowing that the operating …
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The refraction, shoaling and structure of non-linear internal waves at a continental shelf margin
… Shelf Edge Study (SES) and the Shelf Edge Study Acoustic Measurement Experiment (SESAME) from August-September 1995 and August1996 is used to describe the internal wave characteristics. During a period of neap tides a set of internal solitary waves was tracked across the continental slope every …
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Investigation into methods for the calculation and measurement of pulverised coal boiler flue gas furnace exit temperature
… a case study, and is evaluated in terms of the measurement uncertainties which are propagated on the intermediate parameters calculated, as well as on the final calculated FET. The main conclusions are that this indirect method contains various uncertainties, due to parameters which have to be …
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Correlación entre parámetros acústicos objetivos y características físico arquitectónicas en templos católicos del período colonial en ciudades representativas del Perú
This research presents the acoustical characterization of 52 colonial churches in Southern Peru. They are a representative sample of the large historic and artistic legacy of the period from the middle of the XVI Century to the beginning of the XIX Century. Through a statistical analysis, it …
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Towards a silent fan: an investigation of low-speed fan aeroacoustics
… cases, health damage. Of the total noise, aeroacoustic noise – produced by unsteadiness in the air – often represents a significant source and is intrinsically linked to the aerodynamic features of the flow field. In this work, the aeroacoustics of low-speed fans are investigated using a …
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A calibrated dual-port acoustic Vector Network Analyser
… thesis presents the design and calibration of an Acoustic Vector Network Analyzer (AVNA), which represents further adaptation of this technology into other engineering fields. This goal requires several developments; a repeatable acoustic waveguide flange/joint, a calibration method(s), …