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 3 of 3 for “"noise control methods"”.
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Feasibility study of a hybrid passive/active noise absorption system
… development of a compact hybrid Passive/Active noise absorption system that would be effective over a wide frequency range. The Passive/Active system efficiently integrates both passive and active noise control methods. Both theoretical and experimental investigations were carried out in this …
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Broadband Acoustic Liner Optimization Study Using Novel Poro-elastic Materials
… associated with reducing aircraft engine noise, there is need for acoustic liner configurations that target broadband performance. This thesis experimentally and analytically investigates passive noise control methods to improve broadband frequency attenuation through various acoustic …
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Smart double panel with decentralised active damping units for the control of sound transmission
… aircraft double panel for active vibroacoustic control. The control of the double panel vibration is implemented using Multi-Input-Multi-Output (MIMO) decentralised velocity feedback loops. The loops are applied via an array of electrodynamic force actuators and collocated velocity sensors. The …