Sökning: "microphone arrays"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden microphone arrays.

  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. Online Secondary Path Modelling for Spatial Active Noise Control with Arbitrarily Spaced Arrays

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jesper Brunnström; [2021]
    Nyckelord :Active noise control; Secondary path modelling; Spatial; Adaptive filter; Multichannel; Least mean squares; Aktiv brusreducering; Sekundärvägsmodellering; Spatial; Adaptiv Filtrering; Multikanal; Minsta kvadratmetoden;

    Sammanfattning : In this work we explore online secondary path modelling (SPM) in the context of spatial active noise control (ANC). Specifically, we are interested in the reduction of broadband noise over a three-dimensional region, without restrictions on microphone and loudspeaker array placement. LÄS MER

  4. 3. Low Complexity Beamformer structures for application in Hearing Aids

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Eleni Koutrouli; [2018]
    Nyckelord :hearing aids; beamformers; MVDR algorithm; microphone arrays;

    Sammanfattning : Background noise is particularly damaging to speech intelligibility for people with hearing loss. The problem of reducing noise in hearing aids is one of great importance and great difficulty. Over the years, many solutions and different algorithms have been implemented in order to provide the optimal solution to the problem. LÄS MER

  5. 4. Filtering with spatial parameters in B-format audio streams

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

    Författare :Viktor Sannum; [2018]
    Nyckelord :Ambisonics; B-format; Spatial audio; audio filtering; Technology and Engineering;

    Sammanfattning : The B-format is an audio format capable of reproducing full spherical surround audio, meaning sounds can appear as if coming from any direction around the listener. This thesis investigates an approach to quantify and manipulate the spatial information carried in B-format audio signals. LÄS MER

  7. 5. Improving Spatial Sound Capturing on Mobile Devices Through Fusion of Inertial Measurement Data

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Pouya Ashraf; [2018]
    Nyckelord :;

    Sammanfattning : Through the use of sensor arrays it is possible to extract spatial information about signals present in the environment. For instance position, velocity, distance, etc. LÄS MER