MicrophoneArray

MicrophoneArray - Microphone array Raymond Sastraputera...

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Microphone array Raymond Sastraputera
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Overview Introduction Problem Solution Implementation Experimentation Conclusion
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Introduction (Problem) Signal coming to a microphone Speech signal Noise signal Good signal consist of High speech signal Low noise signal
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Introduction (Solution) Microphone array Beam forming theory VAD Cross correlation Ref(1)
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Implementation Matlab Examine(file) Combine(file) VAD(file) Data source Ref(2)
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Samples in the Project Microphone array signal Position 1 2 3 4 5 6 7 8 1 2 3 4 5 6 Microphone Array 100 cm 7 cm Microphone Speaker 1 3 4 5 6 7 8 2
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Beam forming Theory delay travel distance Microphone Source
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Microphone array output Known source position Easily combine Unknown Approximate the position VAD Combine
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VAD Uses two size window Small Large Based on energy change Small window > large window
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VAD
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Cross correlation Mid max Obtaining delay in aligning several signals
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This note was uploaded on 02/11/2012 for the course ECE 5525 taught by Professor Staff during the Fall '10 term at FIT.

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MicrophoneArray - Microphone array Raymond Sastraputera...

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