Sökning: "sound-absorbing"

Visar resultat 1 - 5 av 25 uppsatser innehållade ordet sound-absorbing.

  1. 1. The effect of furniture on room acoustic parameters and its dependence on the sound absorbing properties of the ceiling

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Huong Nguyen; [2023]
    Nyckelord :Room acoustics; furniture; Sabine s formula; SEA model; sound absorption; sound scattering; reverberation time; speech clarity; sound strength; Technology and Engineering;

    Sammanfattning : In ordinary public rooms such as classrooms and offices, the base line of acoustical treatment is an absorbent suspended ceiling. Due to the non-uniform distribution of the absorptive ceiling material, the scattering as well as the absorption properties of furniture will have a significant effect on room acoustic parameters such as reverberation time, speech clarity and sound strength. LÄS MER

  3. 2. The effect of high-ratio biochar replacement in concrete on performance properties : Experimental study of biochar addition to concrete mixture.

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Byggkonstruktion och brand

    Författare :Mina Turovaara; [2022]
    Nyckelord :Biochar; Concrete; Sustainability; Cement; Biochar in concrete; Carbon dioxide; Building industry; Micro-structure; Biokol; Betong; Hållbarhet; Cement; Biokol i betong; Koldioxid; Byggsektorn; Mikrostruktur;

    Sammanfattning : Globally the emissions of carbon dioxide from anthropogenic activities are an issue regarding the future of our planet. Today the building industry is a large contributor with approximately 10 percent of the total emissions coming from energy usage in the building industry, where about 7 percent of the global CO2 emissions are connected to the cement industry. LÄS MER

  4. 3. Framtagning av en A-klassificerad diskret utformad ljudväggabsorbent

    Master-uppsats, Mälardalens universitet/Akademin för innovation, design och teknik

    Författare :Philip Ragnarsson; [2022]
    Nyckelord :Wall absorber; porous absorber; resonance absorber; sound absorption calculator; discreet design; Väggabsorbent; porös absorbent; resonansabsorbent; ljudabsorptionskalkylator; diskret utformning;

    Sammanfattning : The following project has been carried out in collaboration with Abstracta AB (AAB), a company based in Lammhult with specialization in sound landscapes for indoor environments. The company manufactures different types of products with sound-absorbing properties where sustainability and design are in great focus. LÄS MER

  5. 4. A comparison of binaural recordings performed in six different room configurations

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Denice Perkhed; [2021]
    Nyckelord :Binaural recordings; absorbtion coefficient; reverberation time; anechoic chamber; listening test; Psychoacoustics; Technology and Engineering;

    Sammanfattning : Children in Swedish preschools are exposed to high noise levels that can cause hearing damage or voice related problems among both teachers and students, this since they have to raise their voice in order to make themselves heard in a noisy environment. Because of this it is of interest to be able to predict the sound environment in preschools. LÄS MER

  7. 5. Strategisk studiemiljöutveckling : och relevansen för studieplatsen Kokong

    Uppsats för yrkesexamina på grundnivå, Luleå tekniska universitet/Institutionen för ekonomi, teknik, konst och samhälle

    Författare :Markus Segerström; [2021]
    Nyckelord :Aktivitetsbaserad; studiemiljö; arbetsmiljö; co-design; bildning; innovation;

    Sammanfattning : The task for the work was to find out how the study environment at LTU can strategically be developed. The background to this work is that the learning environment is a subject that engages more and more people, SUHF (2016) writes that it could almost be said to be red- hot as a theme. LÄS MER