Sökning: "Road Traffic Noise"

Visar resultat 21 - 25 av 43 avhandlingar innehållade orden Road Traffic Noise.

  1. 21. Numerical modelling of sound propagation to closed urban courtyards

    Författare :Maarten Hornikx; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; courtyard; urban noise abatement schemes; pseudospectral; road traffic noise; equivalent sources method; scale model study; urban canyon;

    Sammanfattning : Because modern urban environments suffer from excessive levels of road traffic noise, access to closed courtyards is essential in order to offer urban sound environments of high quality with regard to health and perceived sound. To reach this quality, which is described by the quiet side definition, the 24-hour equivalent noise level should be below 45 dB(A). LÄS MER

  3. 22. Sound propagation to two-dimensional shielded urban areas: a numerical and scale model study of façade treatments

    Författare :Maarten Hornikx; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urban street canyon; scale model study; urban noise abatement schemes; road traffic noise; parabolic equation; equivalent sources model; 2.5-D geometry;

    Sammanfattning : .... LÄS MER

  4. 23. A Shield against Distraction from Environmental Noise

    Författare :Niklas Halin; Patrik Sörqvist; Jessica Ljungberg; John Marsh; Sara Bengtsson; Högskolan i Gävle; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; environmental noise; distractibility; task engagement; working memory capacity; office-related tasks; miljöljud; distraktion; engagemang i uppgiften; arbetsminneskapacitet; kontorsrelaterade arbetsuppgifter;

    Sammanfattning : Working in noisy environments can be detrimental to cognitive performance. In order to perform well people have to find a way to attenuate distraction. LÄS MER

  5. 24. Iterative Road Grade Estimation for Heavy Duty Vehicle Control

    Författare :Per Sahlholm; Karl Henrik Johansson; Jonas Sjöberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; road grade; estimation; heavy duty vehicle; Kalman filter; automatic control; Automatic control; Reglerteknik;

    Sammanfattning : This thesis presents a new method for iterative road grade estimation based on sensors that are commonplace in modern heavy duty vehicles. Estimates from multiple passes of the same road segment are merged together to form a road grade map, that is improved each time the vehicle revisits an already traveled route. LÄS MER

  7. 25. Stochastic Resonance and Noise-Assisted Signal Transfer : On Coupling Effects of Stochastic Resonators and Spectral Optimization of Fluctuations in Random Network Switches

    Författare :Peter Hammerstein; Claes Granqvist; Laszlo Kish; Hans Liljenström; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; stochastic resonance; nonlinear stochastic dynamics; noise and fluctuations; magnetic domains; Teknisk fysik; Engineering physics; Teknisk fysik;

    Sammanfattning : Recent research shows that noise or random fluctuations must not always be destructive in Nature by degrading system performance. On the contrary, in nonlinear systems they can synchronize systems or enhance the quality of signal transmission. The latter possibility is reported in the thesis. LÄS MER