Sökning: "sound effects"
Visar resultat 21 - 25 av 205 avhandlingar innehållade orden sound effects.
21. Low frequency noise during work. Effects on performance and annoyance
Sammanfattning : Aims. Low frequency noise (LFN) is defined as "a noise with a dominant frequency content of 20 to 200 Hz". Common sources of LFN in occupational environments are ventilation, heating and air-conditioning systems, computer network installations and compressors. LÄS MER
22. Investigation of perforated mufflers and plates
Sammanfattning : Mufflers are used in for instance exhaust system of cars or trucks to reduce noise. Perforated pipes are one of the main components of modern mufflers. To study acoustic properties of mufflers with perforated pipe is one of the main targets of this thesis. LÄS MER
23. Design and Analysis of Diagnosis Systems Using Structural Methods
Sammanfattning : In complex and automated technological processes the effects of a fault can quickly propagate and lead to degradation of process performance or even worse to a catastrophic failure. This means that faults have to be found as quickly as possible and decisions have to be made to stop the propagation of their effects and to minimize process performance degradation. LÄS MER
24. A Wave Expansion Method for Aeroacoustic Propagation
Sammanfattning : Although it is possible to directly solve an entire flow-acoustics problem in one computation, this approach remains prohibitively large in terms of the computational resource required for most practical applications. Aeroacoustic problems are therefore usually split into two parts; one consisting of the source computation and one of the source propagation. LÄS MER
25. Affect as a Component of Perceived Sound and Vibration Quality in Aircraft
Sammanfattning : The concept of product sound quality is becoming an integral component of product development and design. The research presented in this thesis test the notion that affective reactions (i.e. positive-negative feelings) are a major determinant of perceived sound quality. LÄS MER