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Design and construction of a magnetoresistive microphone / Addad, Malik

Public ISBD Titre : Design and construction of a magnetoresistive microphone Type de document : texte imprimé Auteurs : Addad, Malik, Auteur ; E. Cohen, Directeur de thèse Editeur : Manchester : [s.n.] Année de publication : 1985 Importance : 56 f. Présentation : ill. Format : 30 cm. Note générale : Master of Science : Electronic engineering : University of Manchester : 1985 Annexe f. 57 - 61 . Bibliogr. f. 62 Langues : Anglais (eng) Mots-clés : Magnetoresistive  microphone Acoustics Index. décimale : Ms00885 Résumé : The purpose of this dissertation is to design and construct a magnetoresistive microphone using the magnetoresistive effect. The aim of the first two chapters is to present a preliminary knowledge about magnetoresistivity, magnetism and acoustics so as to get necessary background to carry out this dissertation. Although the main purpose of the third chapter has been the design and the construction of the magnetoresistive microphone, the design of the magnet and polepieces covers two thirds of it. This is due to the fact that the better the design of the magnet and polepieces, the better the magnetoresistive microphone performances. Futhermore, for every magnet constructed the graph of the magnetoresistance R against displacement x has been plotted and then, the gradient calculated. The purpose of designing several magnets is to find out the magnet which has the appropriate gradient. The higher the gradient is, the more sensitive the magnetoresistive microphone will be. The final chapter has been devoted to the calibration of the microphone using an anechoic chamber. Design and construction of a magnetoresistive microphone [texte imprimé] / Addad, Malik, Auteur ; E. Cohen, Directeur de thèse . - Manchester : [s.n.], 1985 . - 56 f. : ill. ; 30 cm. Master of Science : Electronic engineering : University of Manchester : 1985 Annexe f. 57 - 61 . Bibliogr. f. 62 Langues : Anglais (eng) Mots-clés : Magnetoresistive  microphone Acoustics Index. décimale : Ms00885 Résumé : The purpose of this dissertation is to design and construct a magnetoresistive microphone using the magnetoresistive effect. The aim of the first two chapters is to present a preliminary knowledge about magnetoresistivity, magnetism and acoustics so as to get necessary background to carry out this dissertation. Although the main purpose of the third chapter has been the design and the construction of the magnetoresistive microphone, the design of the magnet and polepieces covers two thirds of it. This is due to the fact that the better the design of the magnet and polepieces, the better the magnetoresistive microphone performances. Futhermore, for every magnet constructed the graph of the magnetoresistance R against displacement x has been plotted and then, the gradient calculated. The purpose of designing several magnets is to find out the magnet which has the appropriate gradient. The higher the gradient is, the more sensitive the magnetoresistive microphone will be. The final chapter has been devoted to the calibration of the microphone using an anechoic chamber.

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Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms00885	Ms00885	Papier	Bibliothèque centrale	Mémoire de Master	Disponible