Sökning: "akustik"

Visar resultat 1 - 5 av 1065 avhandlingar innehållade ordet akustik.

  1. 1. Vibrations, damping and power dissipation in Car Tyres

    Författare :Martin Fraggstedt; Svante Finnveden; Ines Lopez; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Acoustics; Akustik;

    Sammanfattning : Traffic is a major source of green house gases. The transport field stands for 32 % of the energy consumption and 28 % of the total CO2 emissions, where road transports alone causes 84 % of these figures. LÄS MER

  2. 2. Motståndets akustik : Språk och (o)ljud hos Peter Weiss 1946–1960

    Författare :Markus Huss; Ola Holmgren; Anders Olsson; Frank Thomas Grub; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Peter Weiss; monolingualism; multilingualism; exile literature; migration; intermediality; translation; sounds; noises; Stunde Null; Kahlschlag; Stig Dagerman; Gunnar Ekelöf; enspråkighet; flerspråkighet; exillitteratur; migration; intermedialitet; översättning; ljud; oljud; Literature; litteraturvetenskap;

    Sammanfattning : This study explores how language is thematized in a selection of literary texts written in Swedish and German by Peter Weiss between 1946 and 1960. The textual interpretations seek to establish how Weiss’s literary work forms a multifaceted reflection on language and its cultural, historical and material preconditions. LÄS MER

  3. 3. Numerical Modelling of Dynamics of Light Porous Materials

    Författare :Peter Göransson; Teknisk akustik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mechanical engineering; glass fibre; foam; material characterisation; elasto-acoustic; fluid-structure interaction; finite element; Biot; porous material; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Sammanfattning : Porous materials are among the most commonly used materials for noise and vibration reduction in modern transportation vehicles. To design, industrially relevant, weight and cost effective noise and vibration measures, there is a need for general prediction models capable of representing the elasto-acoustic behaviour of such materials. LÄS MER

  4. 4. Acoustical properties of earplugs

    Författare :Per Hiselius; Teknisk akustik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; acoustic modelling; objective measurement; insertion loss; earplugs; HPE; HPD; hearing protectors; Two-Port; Four-Pole; attenuation; electro acoustics; acoustics;

    Sammanfattning : In this study an experimental setup for measurements of high impedance objects in ducts, yielding the acoustical Two-Port properties of the object, is applied to earplugs. A frequently used experimental setup for measuring objective acoustical properties of earplugs is that of artificial ears. Great effort is spent on duplicating the human ear. LÄS MER

  5. 5. Drum sound from floor coverings - objective and subjective assessment

    Författare :Ann-Charlotte Johansson; Teknisk akustik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vakuumteknik; vibrationer; akustik; hydraulik; Maskinteknik; vacuum technology; vibration and acoustic engineering; hydraulics; acoustic standard; Mechanical engineering; tapping machine; veneer flooring; parquet flooring; binaural recording; foot impact; loudness; sound quality; listening test; paired comparisons; walking sound; drum sound; building acoustics; psychoacoustics; laminate flooring;

    Sammanfattning : Drum sound is the sound produced when an object, such as a foot, hits the flooring in the room in which the receiving ear is located. Drum sound has attracted interest in recent years, particularly due to an increased use of thin floating floor constructions, such as veneer or laminate flooring, which can produce loud and sharp walking sound. LÄS MER