Sökning: "microphone array signal processing"

Visar resultat 1 - 5 av 19 uppsatser innehållade orden microphone array signal processing.

  1. 1. Approach for frequency response-calibration for microphone arrays

    M1-uppsats, KTH/Hälsoinformatik och logistik

    Författare :Jacob Drotz; [2023]
    Nyckelord :microphone array; frequency response; calibration; sine sweep; inverse filter; digital signal processing DSP ; convolution; Fast Fourier Transform FFT ; Discrete Fourier Transform DFT ; acoustic measurements; audio engineering; mikrofonarray; frekvenssvar; kalibrering; sinussvep; inverterat filter; digital signalbehandling; faltning; Fast Fourier Transform FFT ; Discrete Fourier Transform DFT ; akustiska mätningar; ljudteknik;

    Sammanfattning : Matched frequency responses are a fundamental starting point for a variety ofimplementations for microphone arrays. In this report, two methods for frequencyresponse-calibration of a pre-assembled microphone array are presented andevaluated. LÄS MER

  3. 2. Development of a demo platform on mobile devices for 2D- and 3D-sound processing

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Frans Rosencrantz; [2020]
    Nyckelord :Spatial Audio; Raspberry PI; Microphone Array; Dirac;

    Sammanfattning : This thesis project aims for the development of a demonstration platform on mobile devices for testing and demonstrating algorithms for 2D and 3D spatial sound reproduction. The demo system consists of four omnidirectional microphones in a square planar array, an Octo sound card (from Audio Injector), a Raspberry Pi 3B+ (R-Pi) single-board computer and an inertial measurement unit (IMU) located in the center of the array. LÄS MER

  4. 3. Physical Structures for Signal Separation

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

    Författare :Albin Nordsjö; [2016]
    Nyckelord :Signal separation; physical; parabolic reflector; reflector; signal processing; Technology and Engineering;

    Sammanfattning : This master’s thesis studies the use of physical structures for signal source separation. A parabolic reflector was used to alter the directional properties of one microphone in a two-microphone array. A method to estimate the mixing channels from measured data is presented, as well as a method to find the optimal separating channels. LÄS MER

  5. 4. Sound Source Localization and Beamforming for Teleconferencing Solutions

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för matematik och matematisk statistik

    Författare :Angelica Kjellson; [2014]
    Nyckelord :statistical digital signal processing; microphone array signal processing; sound source localization SSL ; beamforming; uniform circular array UCA ; teleconferencing;

    Sammanfattning : In teleconferencing the audio quality is key to conducting successful meetings. The conference room setting imposes various challenges on the speech signal processing, such as noise and interfering signals, reverberation, or participants positioned far from the telephone unit. LÄS MER

  7. 5. Implementation and evaluation of spectral subtraction (SS) with minimum statistics and wiener beamformer combination

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Venkata Rami Reddy Datla; [2013]
    Nyckelord :Direction Of Arrival DOA ; Wiener Beamformer; Microphone Array; SNRI ;

    Sammanfattning : In mobile communication systems, speech signal can be distorted by acoustic noise such as babble speech noise. Such kind of noises can distort the quality of speech signal to a high extent. LÄS MER