Sökning: "Master Thesis KTH mwl"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden Master Thesis KTH mwl.

  1. 1. Variable acoustics in multi-functional stadiums

    Master-uppsats, KTH/Teknisk akustik

    Författare :Felix Vernersson; [2022]
    Nyckelord :Variable acoustics; Reflections; Gain; Reverberation; Clarity; Frequency masking; Perception of reflected sounds; Variabel akustik; Reflektioner; Rumsförstärkning; Efterklang; Klarhet; Frekvensmaskering; Uppfattning av reflekterade ljud;

    Sammanfattning : This paper handles the background theory, methods and results of the master thesis project titled "Variable acoustics in multi-functional stadiums". \\ The purpose of the project was to investigate whether variable room acoustics could be applicable to large multi-functional stadiums to improve their ability to adapt the soundscape in the stadium for different types of events. LÄS MER

  3. 2. Acoustic properties of a 5G Telecom Equipment Shroud Design for Noise suppression

    Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWL

    Författare :David Andersson; [2021]
    Nyckelord :Acoustics; 5G; Shroud; Telecom; Noise reduction; Akustik; 5G; Kåpa; Teleutrustning; Ljudisolering;

    Sammanfattning : As technology moves forward it has a tendency to consume more and more power that needs to be cooled by bigger and louder fans, this is especially true for the new generation of 5G radio equipment. This Master thesis is a collaboration with Ericsson and attempts to construct a shroud for containing a number of 5G radio units whilst attenuating the fan noise of the units as effectively as possible. LÄS MER

  4. 3. Modelling of the vibrational behavior of housing plates filled with fibrous material

    Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWL

    Författare :Da Cao; [2020]
    Nyckelord :;

    Sammanfattning : Silencers are used in vehicles to reduce the noise in the engine system. However,silencers themselves may produce break-out noise due to the interactionwith the exhaust gas ow and structure. In this Master thesis project, thenumerical simulation of vibrational behavior of housing plates of silencers isdeveloped. LÄS MER

  5. 4. Aero and vibroacoustical prediction of the noise generated by turbulent boundary layers

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Alberto Alonso pinar; [2019]
    Nyckelord :;

    Sammanfattning : Flow noise is a major noise source in the transportation industry from the automotive up to the aircraft industry. The characterization of the aerodynamic excitations and of the structure transmission is of primary interest in order to improve the passenger and crew comfort. LÄS MER

  7. 5. Absorption properties of green sound barriers

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Sherif Fouda; [2018]
    Nyckelord :Impedance tube; Sound absorption measurement; transfer function; three microphones; Sound barrier; ISO 10534-2; ASTM E2611-09.;

    Sammanfattning : This thesis was conducted on behalf of Butong AB, who wanted to test and develop an environmental friendly, so called green sound barrier, which combines both art and science.Different configurations of the product were proposed by the company with various filling materials, as it was predicted that the filling materials would be the main sound absorbent among all parts of the structure. LÄS MER