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.
Results
Showing 1 to 6 of 6 for “"Acoustical engineering"”.
-
Acoustic emission source location in composite aircraft structures using modal analysis
The aim of this research work was to develop an Acoustic Emission (AE) source location method suitable for Structural Health Monitoring (SHM) of composite aircraft structures. Therefore useful key signal features and sensor configurations were identified and the proposed method was validated using …
-
Sound absorption performance of EFBMF panel for building acoustic material
For decades synthetic materials have been widely used as acoustic absorbers for building. However their adverse effects to humans and the environment have led to the use of natural materials. This research aims to introduce two sources of natural fibers from palm oil residues as an acoustic …
-
Investigations of ultra shallow junction ion implanted biaxial tensile strained silicon by means of X-Ray, Raman and photoacoustic techniques
The application of strain to the active channel region of the metal-oxide-semiconductor-field-effect-transistor (MOSFET) has become a necessary practice in integrated circuit (IC) fabrication. The introduction of strain allows increased carrier mobilities, and concomitant device performance …
-
Prediction-driven computational auditory scene analysis
The sound of a busy environment, such as a city street, gives rise to a perception of numerous distinct events in a human listener--the 'auditory scene analysis' of the acoustic information. Recent advances in the understanding of this process from experimental psychoacoustics have led to several …
-
Stresses and strain in silicon: 3-dimensional analytical capabilities for the non-invasive evaluation of strain fields in Si wafers and packaged chips
IC manufacturing and chip embedding processes can induce stresses in Si, which have the potential to affect device functionality and reliability and ultimately lead to device failure. One of the challenges for the future of semiconductor manufacturing and chip packaging is the development of …
-
Optimal placement of sensor and actuator for sound-structure interaction system
… boundary conditions as in the case in practical engineering applications. An experimental acoustic cavity with five walls of timber and a thin aluminium sheet fixed tightly on the cavity mouth is chosen in this thesis as a good representation of general sound-structure interaction systems. The …