Sökning: "low noise"

Visar resultat 1 - 5 av 662 avhandlingar innehållade orden low noise.

  1. 1. Gearbox noise Correlation with transmission error and influence of bearing preload

    Detta är en avhandling från Stockholm : KTH

    Författare :Mats Åkerblom; KTH.; [2008]
    Nyckelord :gear; gearbox; noise; vibration; transmission error; bearing preload; TECHNOLOGY Other technology Mechanical engineering; TEKNIKVETENSKAP Övriga teknikvetenskaper Maskinteknik;

    Sammanfattning : The five appended papers all deal with gearbox noise and vibration. The first paper presents a review of previously published literature on gearbox noise and vibration.The second paper describes a test rig that was specially designed and built for noise testing of gears. LÄS MER

  2. 2. GaN HEMT Low Frequency Noise Characterization for Low Phase Noise Oscillator Design

    Detta är en avhandling från Stockholm : KTH

    Författare :Thi Ngoc Do Thanh; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low frequency noise; flicker noise; phase noise; deposition method.; oscillator; VCO; GaAs pHEMT; MMIC; GaN HEMT; passivation; InGaP HBT;

    Sammanfattning : The thesis presents low frequency noise (LFN) characterization of Gallium Nitride (GaN) High Electron Mobility Transistors (HEMTs) for low phase noise oscillator design. First, GaN HEMT technology is benchmarked versus other transistor technologies, e.g. LÄS MER

  3. 3. Human response to wind turbine noise perception, annoyance and moderating factors

    Detta är en avhandling från Göteborg : Occupational and Environmental Medicine, Department of Public Health and Community Medicine, Institute of Medicine, The Sahlgrenska Academy, Göteborg University

    Författare :Eja Pedersen; Högskolan i Halmstad.; Göteborgs universitet.; Gothenburg University.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURAL SCIENCES; NATURVETENSKAP; Noise; Environmental exposure; Wind; Audio-visual interaction; Low-level noise exposure; wind turbines; noise annoyance; sound perception; audio-visual interaction; low-level noise exposure;

    Sammanfattning : Aims: The aims of this thesis were to describe and gain an understanding of how people who live in the vicinity of wind turbines are affected by wind turbine noise, and how individual, situational and visual factors, as well as sound properties, moderate the response.Methods: A cross-sectional study was carried out in a flat, mainly rural area in Sweden, with the objective to estimate the prevalence of noise annoyance and to examine the dose-response relationship between A-weighted sound pressure levels (SPLs) and perception of and annoyance with wind turbine noise. LÄS MER

  4. 4. Ultra-Low Power InAs/AlSb HEMTs for Cryogenic Low-Noise Applications

    Detta är en avhandling från Göteborg : Occupational and Environmental Medicine, Department of Public Health and Community Medicine, Institute of Medicine, The Sahlgrenska Academy, Göteborg University

    Författare :Giuseppe Moschetti; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; low noise; InAs AlSb; metamorphic; low power; high frequency; high electron mobility transistor HEMT ; cryogenic; ion implantation;

    Sammanfattning : The InAs/AlSb high electron mobility transistor (HEMT) is an emerging microwave device technology for ultra-low power and low noise applications. Due to the low bandgap (0. LÄS MER

  5. 5. Low frequency noise in thin film colossal magnetoresistors

    Detta är en avhandling från Fysiska institutionen

    Författare :Alvydas Lisauskas; KTH.; [2000]
    Nyckelord :Low frequency; Noise; Colossal magnetoresistance; Uncooled bolometer;

    Sammanfattning : .... LÄS MER