Sökning: "room acoustics"

Visar resultat 1 - 5 av 39 avhandlingar innehållade orden room acoustics.

  1. 1. Time Domain Boundary Element Methods for Acoustic Scattering

    Detta är en avhandling från Chalmers University of Technology

    Författare :Georgios Natsiopoulos; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Akustik; Acoustics; boundary element method; time domain; acoustic scattering; hypersingular; regularization; vector potential; Hermite interpolation; curved surface; room acoustics; boss model; transient;

    Sammanfattning : In room acoustics, numerical computation of scattering phenomena is an important subject, since it is needed to accurately predict the influence of reflectors, the audience, balconies, etc, on the perceived acoustic quality of auditoria. The large physical volumes of auditoria and the wide frequency content of music and speech, together with the complicated geometries involved however, makes predictions in room acoustics a challenging task from a computational point of view. LÄS MER

  2. 2. Absorption Characteristics of Periodically Perforated Suspended Ceilings

    Detta är en avhandling från Engineering Acoustics, LTH, Lund University

    Författare :Dag Holmberg; Lunds universitet.; Lund University.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building construction; Byggnadsteknik; measurement device.; flow resistance; suspended ceilings; periodically perforated facing; resonant absorbers; Room acoustics; building acoustics;

    Sammanfattning : Popular Abstract in Swedish I innemiljöer är ofta innertaken nedsänkta för att ge plats åt elinstallationer, ventilationsdon och dylikt. Om innertaken från början består av plattor som reflekterar ljud, så kan dessa perforeras och förses med porösa skikt, och därmed även användas som ljudabsorbenter. LÄS MER

  3. 3. Factors Governing Acoustical Comfort In Vehicle Compartments

    Detta är en avhandling från Chalmers University of Technology

    Författare :Oliver Jung; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Akustik; Acoustics; Acoustical Comfort; Driving Noise; Sound Quality; Vehicle Acoustics; Lombard Effect; Speech Quality; Speech Communication; Psychoacoustics; Emotions; Cognition Psychology;

    Sammanfattning : A pleasant interior sound field is an essential comfort criterion for vehicle occupants. The pleasantness is mainly influenced by a low overall sound pressure level. Further minimization of driving noise, however, is constricted on the lower end by physical limitations. LÄS MER

  4. 4. The use of Textiles in an Acoustic Context

    Detta är en avhandling från Chalmers University of Technology

    Författare :Karl Tillberg; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Arkitektur och bebyggelsevård; Architecture and architectural conservation and restoration; Byggnadsteknik; Building engineering; Akustik; Acoustics; acoustic textiles; room acoustics; classroom; porous absorbers; resonance absorbers; helmholtz absorbers; panel absorbers; woven fabric; knitted fabric; nonwoven material;

    Sammanfattning : Working with textiles in an acoustic context gives enormous possibilities to combine the acoustic function of materials with the visual function (aesthetics). Depending on the material choice and the production techniques, textiles may for instance be flexible, stiff, airtight, have high density or high porosity. LÄS MER

  5. 5. Studies of Edge Diffraction and Scattering: Applications to Room Acoustics and Auralization

    Detta är en avhandling från Chalmers University of Technology

    Författare :Rendell Torres; Chalmers tekniska högskola.; Chalmers University of Technology.; [2000]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Samhällsbyggnadsteknik och arkitektur; Civil engineering and architecture; Teknisk mekanik; Engineering mechanics; diffraction; scattering; diffusion; auralization; room acoustics; architectural acoustics; virtual reality; virtual environments;

    Sammanfattning : This thesis examines ways of including edge diffraction and surface scattering to improve room acoustics auralization, i.e., the binaural replication of an acoustic environment. The approach combines numerical and psychoacoustical studies to discern what level of computational accuracy is necessary to obtain perceptually adequate replication. LÄS MER