Mikrofonski sustav za detekciju položaja zvučnih izvora u prostoru

master's thesis

• Title (english): Microphone array for detection of sound source position in space
• Author: Domagoj Došen
• Mentor: Kristian Jambrošić (mentor)
• Committee member: Kristian Jambrošić (predsjednik povjerenstva)
• Committee member: Bojan Ivančević (član povjerenstva)
• Committee member: Siniša Fajt (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2014-07-04, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom diplomskom radu korišten je mikrofonski niz kao mikrofonski sustav za detekciju položaja zvučnih izvora u prostoru. Takav sustav se naziva i akustička kamera. Za potrebe mjerenja korišteno je 16 omnidirekcijskih mikrofona. Nakon simulacija različitih geometrija niza definirano je da će biti korištena uniformno kružna geometrija radijusa
0.25 m. Mikrofoni su spojeni preko National Instruments sučelja na računalo s kojim se vrši mjerenja i obrada podataka. Mjerenja i obrada podataka se izvodi pomoću programskog paketa Matlab. Za provedbu mjerenja korišten ugrađeni paket alata za prikupljanje podataka i ugrađeni paket za procesiranje mikrofonskih nizova. Obrada se vrši algoritmom „zakasni i zbroji“. Mjerenja su provedena u gluhoj komori i u običnoj prostoriji.

Abstract (english)

In this Master's thesis the microphone array was used as a microphone system for detection of sound source position in space. This system is called acoustic camera. 16 omnidirectional microphones were used for measurement purposes. The use of uniform circular array with 0.25 m radius was defined in this Master's thesis after making simulations with different geometries. The microphones were connected through a National Instruments interface with the computer used for measurements and data processing. Matlab computer software was used for measurements and data processing. Toolbox for data acquisition and toolbox for array processing were used for the implementation of measurements. The processing was performed with the „Delay and sum“ algorithm. The measurements were performed in the anechoic chamber and in the regular room.

• Keywords: Mikrofonski niz; usmjerna karakteristika; lokalizacija izvora; akustička kamera; zakasni i zbroji
• Keywords (english): Microphone array; directivity pattern; source localization; acoustic camera; delay and sum
• Language: croatian
• URN:NBN: urn:nbn:hr:168:637395
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 08:27:52