Sökning: "Aircraft noise"

Visar resultat 11 - 15 av 60 avhandlingar innehållade orden Aircraft noise.

  1. 11. 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

  3. 12. Study of Supersonic Jet Noise Reduction using LES

    Författare :Haukur Hafsteinsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; G3D; Supersonic Jet; PIV; CD-nozzle; CFD; Compressible flow; CAA; Noise Reduction; LES; Flow Control;

    Sammanfattning : Increases in air traffic and denser population around airports have led to stricterregulations on aircraft noise. High noise levels from high-speed aircraft can causehearing damage in pilots and the airfield personnel. The engine is the main sourceof noise of all jet aircraft and is therefore a key component for improvement. LÄS MER

  4. 13. Traffic noise and cardiovascular disease

    Författare :Jenny Selander; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Traffic noise is an increasing problem in urban areas worldwide, but health effects in relation to traffic noise exposure are not well understood. Several studies show that noise may give rise to acute stress reactions, possibly leading to cardiovascular effects, but the evidence is limited on cardiovascular risks associated with traffic noise exposure. LÄS MER

  5. 14. Auralisation of airplanes considering sound propagation in a turbulent atmosphere

    Författare :Frederik Rietdijk; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Auralisation; Aircraft noise; Outdoor sound propagation; Atmospheric turbulence;

    Sammanfattning : Aircraft noise is a major issue in urban areas. Due to a rising level ofurbanisation and the continuing growth of air traffic more people are exposed toaircraft noise than ever. Methods currently used for assessing theimpact of aircraft noise on humans consider mostly energetic quantities, and not thedynamic character of the sound. LÄS MER

  7. 15. User Preferred Trajectories in Commercial Aircraft Operation: Design and Implementation

    Författare :Hanyo Vera Anders; Arthur Rizzi; Tobias Andersson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aeronautics; air traffic management; aircraft operation; flygteknik; flygledning; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : This report describes how an aircraft creates and flies its User Preferred Trajectory from take-off to landing, based on the objectives and constraints the aircraft is subjected to from a technological and operational viewpoint. A basic description of commercial aircraft operation is given, with an emphasis on identifying the different stakeholders (Air Navigation Service Providers, Airline Operation Center, Pilot/Aircraft, Airport and Civil Aviation Authority). LÄS MER