Publication

Annulation du bruit d'une turbine d'avion avec un actionneur

2010
Student Projects

Abstract

Ce projet se place dans une démarche européenne pour la réduction du bruit émanant de l'aviation. En effet, de par l'intensification du trafic aérien, les personnes habitant à proximité d'aéroports ou de couloirs aériens sont de plus en plus perturbées par le bruit des avions. Pour parer à cela, divers projets existent dans toute l'Europe, celui-ci en fait partie. L'idée de base du projet est d'annuler le bruit des turbines d'avion en insérant à l'intérieur de celles-ci des hauts-parleurs qui émettent une onde de pression acoustique de même fréquence que l'onde créée par la turbine, mais de phase opposée. Ainsi, la superposition des deux ondes devrait s'annuler. Plus précisément, ce projet a pour but de simuler les champs magnétiques dans toute la structure d'un haut-parleur déjà existant et de calculer la force générée sur la membrane, ceci dans le but d'optimiser le haut-parleur pour l'application aux turbines d'avion.

Official source

https://infoscience.epfl.ch/entities/publication/f5613480-ce6a-49fd-96a4-8990f004e59c

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2010
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f5613480-ce6a-49fd-96a4-8990f004e59c

About this result

Related concepts (2)

Annulment

Annulment is a legal procedure within secular and religious legal systems for declaring a marriage null and void. Unlike divorce, it is usually retroactive, meaning that an annulled marriage is considered to be invalid from the beginning almost as if it had never taken place (though some jurisdictions provide that the marriage is only void from the date of the annulment; for example, this is the case in section 12 of the Matrimonial Causes Act 1973 in England and Wales).

Declaration of nullity

In the Catholic Church, a declaration of nullity, commonly called an annulment and less commonly a decree of nullity, and in some cases, a Catholic divorce, is an ecclesiastical tribunal determination and judgment that a marriage was invalidly contracted or, less frequently, a judgment that ordination was invalidly conferred. A matrimonial nullity trial, governed by canon law, is a judicial process whereby a canonical tribunal determines whether the marriage was void at its inception (ab initio).