Sökning: "three microphones"

Visar resultat 11 - 15 av 17 uppsatser innehållade orden three microphones.

  1. 11. Acoustic Solutions for Door Station

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Johan Nisula; Sebastian Krill; [2015]
    Nyckelord :beamforming; noise suppression; Technology and Engineering;

    Sammanfattning : This thesis investigates how the audio quality in a door station can be improved by using multiple microphones and implementing beamforming. The concept of beamforming is explained, and two beamforming algorithms are implemented. These are tested with different microphone configurations in both simulated and real environments. LÄS MER

  3. 12. Sensor Array Optimization for Multiple Harmonic Sound Source Separation and DOA

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk akustik

    Författare :Elisabet Suárez Lopéz; [2013]
    Nyckelord :Technology and Engineering;

    Sammanfattning : INTRODUCTION In the last years a lot of researches about source separation have been realized, like extraction of a signal of interest (vocal recognition application), identification of which source gives which sound (motor engine applications) or noise source characterization (environmental application). Most of these techniques for sound source estimation use the signal-subspace approach, where the number of emitting sources is determined by the multiplicity of the lowest eigenvalue of the correlation matrix. LÄS MER

  4. 13. Close talk Speech enhancement in Linear Microphone array for Laptop application

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Pardhasaradhi Reddy Cherukula; [2012]
    Nyckelord :Speech enhancement; Generalized sidelobe canceller; Wiener beamformer; Normalized least mean square algorithm.;

    Sammanfattning : Now a day’s communication through laptops is drastically increasing in numerous fields. During the communication between person to person through laptops the speech signals is contaminated by the other speech interference signals. LÄS MER

  5. 14. Using DSP technology to improve sound quality in active speakers

    Magister-uppsats, Institutionen för teknik och naturvetenskap; Tekniska högskolan

    Författare :Mattias Magnusson; [2010]
    Nyckelord :;

    Sammanfattning : Aditus Science has developed a system to improve the sound quality in speaker systems, using DSP technology. Software developed in MATLAB is being used to make measurements of the speakers via microphones. Based on those results, the parameters for the signal processing in the DSP can be set. LÄS MER

  7. 15. Internetbaserade insamling och behandling av data

    Uppsats för yrkesexamina på grundnivå, Institutionen för teknik och byggd miljö

    Författare :Hamid Moradi; [2008]
    Nyckelord :elektronik;

    Sammanfattning : Abstract Aim of this project was to analyse signals and try to localize the position of source of sound. It is done with three microphones which have 90 degrees angle to each other. Each microphone detects one part of the sound wave. The microphones are connected toan ADC which turns signals from analogue to digital shape. LÄS MER