<p>Abstract</p><p>Aim of this project was to analyse signals and try to localize the position of source of sound. It is done</p><p>with three microphones which have 90 degrees angle to each other. Each microphone detects one part</p><p>of the sound wave. The microphones are connected toan ADC which turns signals from analogue to</p><p>digital shape. After that the three signals are transformed to a computer. As known a computer</p><p>receives only digital signals which are the main reason to use the ADC. The signals are analysed by</p><p>computer with help of special softwares. These softwares are LabVIEW and MATLAB which are used</p><p>in this work. This analysis of the signals is divided in two parts. The first part is the FFT-analyse (Fast</p><p>Fourier Transform) of the signal from the microphones. It means that the signals frequency’s domain</p><p>is showed, in other word it shows which frequency components a signal has. Then the result is showed</p><p>online by a function belonging to LabVIEW which is called Web Publish.</p><p>In second part the position of the signal source is determined by cross correlation. The position is</p><p>determined by the difference of time between two signals from same source which are measured by</p><p>cross correlation and you can determine angle by triangulating which is described in report.</p>
| Identifer | oai:union.ndltd.org:UPSALLA/oai:DiVA.org:hig-3059 |
| Date | January 2008 |
| Creators | Moradi, Hamid |
| Publisher | University of Gävle, Department of Technology and Built Environment |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, text |
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