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 9 of 9 for “"Complex sound"”.
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Propapation and attenuation characteristics of multilayered media
… a minimum required density specified. The use of complex sound speeds to simulate bottom attenuation is reviewed. A numerical instability inherent to the technique that arises during the use of complex sound speeds is investigated. The algorithm is also applied to a deep ocean profile, and the …
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Acoustic function of sound hole design in musical instruments
Sound-hole, an essential component of stringed musical instruments, enhances the sound radiation in the lower octave by introducing a natural vibration mode called air resonance. Many musical instruments, including those from the violin, lute and oud families have evolved complex sound-hole …
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Frequency Analysis of Complex Auditory Cues.
… for extracting information from an often complex acoustic environment. This concept is reflected in Ohm's acoustical law which holds that the ear is able to "hear out" the simple tonal components of a complex sound. Essentially, the ear has been thought to perform a Fourier analysis on the …
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A study of active control techniques for noise reduction in an aircraft fuselage model
… the elementary mechanisms of control of sound transmission into aircraft cabins by two active control techniques: propeller synchrophasing and active vibration control. Propeller synchrophasing involves controlling the relative rotational phase of the engines to achieve maximum cabin …
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Helmholtz Equation Least Squares Based Near-Field Acoustic Holography With Laser
… uses acoustic pressure as input to reconstruct sound field quantities, while this modified HELS based NAH with laser utilizes the normal surface velocities measured by LDV to reconstruct the acoustic quantities at interested positions. Theoretical principles of the HELS based NAH with laser have …
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System Identification and Optimization Methodologies for Active Structural Acoustic Control of Aircraft Cabin Noise
… has been much recent research on the control of complex sound fields in enclosed vibrating structures via active control techniques. Active Structural Acoustic Control (ASAC) has shown much promise for reducing interior cabin noise in aircraft by applying control forces directly to the fuselage …
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The Effect of Three Different Levels of Skill Training in Musical Timbre Discrimination on Alphabet Sound Discrimination in Pre-Kindergarten and Kindergarten Children
… in musical timbre discrimination on alphabet sound discrimination in pre-kindergarten and kindergarten children. The findings of prior investigations indicated similarities between aural music and language perception. Psychoacoustic and neurological findings have reported the discrimination of …
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Studies of behavioral and physiological bases of genetically controlled epileptiform seizures in domestic fowl
… be induced from epileptic chickens by heat, complex sound and photic stimulation. Intermittent light stimulation (ILS) was the most satisfactory seizure-inducing stimulus. The response of epileptic chickens was found to be affected by age and by ILS frequency. The seizure susceptibility and …
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Object-based radio : effects on production and audience experience
… listening model the ways listeners deconstruct complex sound scenes into foreground and background categories ascribing different salience to foreground and background sounds. The second study uses this model to inform a series of card sorting exercises which result in similar foreground and …