Essays about: "DB"

Showing result 1 - 5 of 250 essays containing the word DB.

  1. 1. SuperAcoustics - Development of Android application to measure sound reduction index

    University essay from Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

    Author : Karl Bengtsson; Elliot Sandefeldt; [2019]
    Keywords : Sound reduction index; Android; Application; Acoustic measurements; Sound insulation; Technology and Engineering;

    Abstract : Urban bosättning är vanligt i dagens samhälle och en övervägande andel av befolkningen bor i lägenheter, där ljudisolering är en viktig aspekt rörande trivseln i bostaden. Användning av smartmobiler för akustiska mätningar blir allt vanligare, men inget enkelt verktyg finns idag för att mäta och räkna ut reduktionstalet. READ MORE

  2. 2. Adaptive content-based sound compression

    University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

    Author : Markus Gerard; Marcus Tedenvall; [2019]
    Keywords : Technology and Engineering;

    Abstract : Three different classification solutions for distinguishing events from non-events in surveillance audio are described and evaluated. The three compared methods are energy functions, Gaussian mixture modelling algorithms (GMM) and existing voice activity detectors (VAD). READ MORE

  3. 3. An IoT Solution for Urban Noise Identification in Smart Cities : Noise Measurement and Classification

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Yasser Alsouda; [2019]
    Keywords : urban noise; sound pressure level SPL ; internet of things IoT ; machine learning; support vector machine SVM ; k-nearest neighbors KNN ; bootstrap aggregating Bagging ; random forest; mel-frequency cepstral coeffi-cients MFCC ;

    Abstract : Noise is defined as any undesired sound. Urban noise and its effect on citizens area significant environmental problem, and the increasing level of noise has become a critical problem in some cities. Fortunately, noise pollution can be mitigated by better planning of urban areas or controlled by administrative regulations. READ MORE

  4. 4. Radio signal DOA estimation : Implementing radar signal direction estimation on an FPGA.

    University essay from Linköpings universitet/Datorteknik

    Author : Alfred Patriksson; [2019]
    Keywords : FPGA; DOA; Radar; Direction of Arrival; Monopulse; Amplitude Monopulse; Phase Monopulse;

    Abstract : This master’s thesis covers the design and implementation of a monopulse directionof arrival (DOA) estimation algorithm on an FPGA. The goal is to implement a complete system that is capable of estimating the bearing of an incident signal. READ MORE

  5. 5. Characterization and Modeling of mm-Wave Power Amplifiers

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Victor Hasselfors; [2019]
    Keywords : ;

    Abstract : The next generation of mobile communication (5G) is upon us, and with that newtypes of technologies are needed for improved data rates, reliability, response timeand increased utilization. In this report, two highly efficient linear power amplifiersare characterized and tested with simulated communication signals. READ MORE