dc.contributor.advisor | Svensson, Peter | nb_NO |
dc.contributor.advisor | Nogueiras, Albino | |
dc.contributor.advisor | Genescà-Francitorra, Meritxell | |
dc.contributor.author | Amengual Gari, Sebastia Vicenc | nb_NO |
dc.date.accessioned | 2014-12-19T13:50:14Z | |
dc.date.accessioned | 2015-12-22T11:51:08Z | |
dc.date.available | 2014-12-19T13:50:14Z | |
dc.date.available | 2015-12-22T11:51:08Z | |
dc.date.created | 2014-10-02 | nb_NO |
dc.date.issued | 2014 | nb_NO |
dc.identifier | 752195 | nb_NO |
dc.identifier | ntnudaim:12072 | |
dc.identifier.uri | http://hdl.handle.net/11250/2371139 | |
dc.description.abstract | This thesis deals with the implementation and analysis of diferent methods to generate a first-order directional microphone for source location and noise measurement purposes. The methods analysed include a cardioid capsule, and virtual methods such the combination of the signals of two omnidirectional microphones, the combination of the signals of an omnidirectional and a figure of 8 microphones, as well as a Soundfield microphone which is based on the Ambisonics principle. The frequency response function, directivity error and signal-to-noise ratio of the resulting first-order directional microphones have been experimentally studied by implementing each of the methods, performing measurements in the anechoic chamber of the Acoustics Group at NTNU and post-processing the obtained signals using MatLab. The results obtained from the experiments conclude that the optimum method to generate a first-order directional microphone for measurement purposes at the frequency range of interest of this project (from 80 Hz to 4 kHz) is to use an array of three omnidirectional microphones and combine their signals. | nb_NO |
dc.language | eng | nb_NO |
dc.publisher | Institutt for elektronikk og telekommunikasjon | nb_NO |
dc.title | Alternative methods to generate a first-order directional microphone | nb_NO |
dc.type | Master thesis | nb_NO |
dc.source.pagenumber | 86 | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elektronikk og telekommunikasjon | nb_NO |