Blar i Institutt for elektroniske systemer på emneord "Elektronikk, Signalbehandling, akustikk og media"

Viser treff 1-20 av 21

    • Adaptive non-parametric methods of time-frequency analysis applied on marine propulsion systems 

      Solberg, Frikk Herding (Master thesis, 2015)
      Time-Frequency analysis is an invaluable tool for Rolls-Royce Marine as it helps scheduling maintenance when it is actually needed, rather than periodical appointments. A docked ship means reduced income so avoiding ...

    • Automatic localization of microphone positions for impulse response measurements 

      Slang, Knut Halvor (Master thesis, 2014)
      When performing measurements where many microphone positions are required, measuring every position of these microphones can be tedious work. This thesis looks into the possibilities of automating this process. A well-known ...

    • Binaural Reproduction of Higher Order Ambisonics - A Real-Time Implementation and Perceptual Improvements 

      Vennerød, Jakob (Master thesis, 2014)
      During the last decade, Higher Order Ambisonics has become a popular way of capturing and reproducing sound fields. It can be combined with the theory of spherical microphone arrays to record sound fields, and this ...

    • Digitale Verktøy for Historiefortelling 

      Ulvøen, Andreas (Master thesis, 2015)
      Denne masteroppgaven er et forskningsprosjekt ved Immersive Media Technology Experiences (IMTE) og tar for seg digitale fortellerverktøy og hvordan disse kan brukes til å lage en interaktiv fortelling. I oppgaven har det ...

    • Direktive transdusere for undervanns sensornettverk 

      Johansson, Simon Karl (Master thesis, 2015)
      I denne rapporten har det blitt gjort simuleringer av direktivitetsfunksjonene ved ulike designer og geometrier av svingere, i tillegg til et forsøk i en vanntank med to diskformede svingere plassert vinkelrett på hverandre. ...

    • Dype Nevronett for Talegjenkjenning 

      Lepsøy, Jonathan Halstensen (Master thesis, 2015)
      I dette arbeidet tester vi ytelsen til et fonemgjenkjenningssystem, basert på skjulte markovmodeller, på den norske taledatabasen NAFTA. De skjulte markovmodellenes aposteriori sannsynligheter blir trent ved hjelp av et ...

    • En studie av flutterekko med hensyn på geometrisk akustikk og kantdiffraksjon 

      Skjong, Harald (Master thesis, 2015)
      Flutterekko er et akustisk fenomen som oppstår når gjentatte refleksjoner oppstår mellom to eller flere flater. Dette eksiteres av pulssignal, som for eksempel klapping, og har en etterklang som ofte er lenger enn etterklangen ...

    • Hydroacoustic Channel Emulator - HACE 

      Hauge, Leo Heggem; Hetland, Frank Iversen (Master thesis, 2015)
      Kongsberg Maritime wanted a channel emulator for testing their hydroacoustic equipment before deploying it at sea. The benefits of such a system are that it detects problems in an earlier phase of development, thus ...

    • Høyttaler for forbedret taleoppfattbarhet 

      Gjerstad, Andreas (Master thesis, 2014)
      I denne oppgaven har det blitt jobbet med en liten høyttaler som skal forbedre taleoppfattbarheten for personer med nedsatt hørsel. Det har blitt sett på signalbehandlingen som skal til for å forbedre taleoppfattbarheten ...

    • Implementation and Adaptation of a System for Automatic Classification of Birdsong. 

      Selboe, Kristian (Master thesis, 2015)
      The background for this master thesis is a collaboration between Able Magic and NTNU. At the request of Able Magic there has been conducted a feasibility study by NTNU, which has led to the development of a bird classification ...

    • Implementation of a Relative Positioning System based on Ultrasound 

      Hansen, Alexander Rydland; Fasting, Erlend (Master thesis, 2016)
      Speech communication is essential in human interaction. When working or residing in noisy environments, hearing protectors must be used. This leads to reduced communication abilities. If traditional communications systems ...

    • Measurement and Analysis of Sound Insulation Properties in Acoustical Wall Panels Used in Ships 

      Aasen, Helene Ellefsen (Master thesis, 2015)
      This thesis adresses the challenge of predicting sound insulation properties of cabin walls onboard a platform supply vessel. The sound reduction index is predicted using the softwares WinFLAG and Odeon, thus comparing ...

    • Model based estimation of speckle filter for improved suppression of multiple scattering noise with dual band ultrasound pulse complexes 

      Solberg, Stian (Master thesis, 2015)
      In ultrasound imaging, multiple scattering noise can be severely damaging to the image quality. SURF imaging is a non-linear imaging method that can be used to suppress the multiple scattering noise, and thus improve the ...

    • Modeling and Confidence in a System for Automatic Classification of Birdsong 

      Aagaard, Fredrik Fløttum (Master thesis, 2015)
      It turns out that using a two-state-HMM model structure with appurtenant GMM-based state distributions improves the system performance compared to the use of just GMMs as model structure for each bird specie. Hence, it is ...

    • Multichannel ANC for Motorcycle Helmets 

      Loe, Dag Axel Aarset (Master thesis, 2015)
      This thesis investigates the potential of using active noise control (ANC) for attenuating the wind noise experienced by a motorcycle rider at speed. This is done by recording wind noise simultaneously at several locations ...

    • Naturlig ull som lydabsorbentmateriale 

      Arnesen, Katrine (Master thesis, 2015)
      Med hovedfokus på naturlig ull har ulike aspekter for bestemmelse av absorpsjonsegenskaper blitt undersøkt. Spansk og mongolsk ull er testet og sammenlignet med glassfiber (Glava) og polyester. Generelt gir Glava best ...

    • Romakustikk i øvingslokaler for skolekorps og risiko for hørselskader 

      Meling, Trine Erfjord (Master thesis, 2015)
      Den 9. mai 2014 skrev Stavanger aftenblad en artikkel om risiko for hørselskader ved korpsmusikk. Risiko var knyttet til dårlige øvingslokaler for skolekorps. På bakgrunn av dette engasjerte Sandnes kommune Sinus AS og ...

    • Ship track estimation from single hydrophone data 

      Larsen, Magnus (Master thesis, 2014)
      Passive acoustic range estimation and source tracking using hydrophones have been a problem because of the complexity of the underwater channel. This thesis is concerned with a fast method for the estimation of ship velocity ...

    • Silent Microphone - Active Cancellation of Speech 

      Ljøkjel, Olav (Master thesis, 2015)
      During the work with this master's thesis, the possibilities of controlling the emitted sound from a person speaking by using active control, have been examined. The work included measurements of transfer functions on a ...

    • Sound pressure levels and sound source components for orchestra musicians 

      Rydland, Helena Kristine (Master thesis, 2015)
      The presented study aimed to do investigations on the balance of the sound components found at the ears of orchestra musicians. This was interesting as orchestra musicians are exposed to much sound in their vocational ...