Essays about: "Sound absorption measurement"
Showing result 1 - 5 of 6 essays containing the words Sound absorption measurement.
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1. Modelling of the vibrational behavior of housing plates filled with fibrous material
University essay from KTH/Marcus Wallenberg Laboratoriet MWLAbstract : Silencers are used in vehicles to reduce the noise in the engine system. However,silencers themselves may produce break-out noise due to the interactionwith the exhaust gas ow and structure. In this Master thesis project, thenumerical simulation of vibrational behavior of housing plates of silencers isdeveloped. READ MORE
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2. Absorption properties of green sound barriers
University essay from KTH/MWL Marcus Wallenberg LaboratorietAbstract : This thesis was conducted on behalf of Butong AB, who wanted to test and develop an environmental friendly, so called green sound barrier, which combines both art and science.Different configurations of the product were proposed by the company with various filling materials, as it was predicted that the filling materials would be the main sound absorbent among all parts of the structure. READ MORE
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3. Development of an Upconverting Nanoparticles Quantum Yield Measurement System
University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionenAbstract : Fluorescence imaging is a growing biomedical technique; it can be used to localize the luminescent biomarkers inside the tissue. Lanthanide-doped upconverting nanoparticles (UCNPs) are promising luminescent probes for multiple applications in biophotonics. They allow acquiring autofluorescence-free recordings with high spatial resolution. READ MORE
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4. A method to apply ISO 3745 for the sound power measurement of I.C. Engines in a limited space
University essay from KTH/MWL Marcus Wallenberg LaboratorietAbstract : The Reduction of engine noise, one of the primary noise sources in trucks and busses, is essential in order to fulfill various noise emission regulations such as ISO 362 [1]. At the same time, it is equally important to meet market demands in order to attract new customers while competing with other brands to lower overall noise levels. READ MORE
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5. Investigation og Nonlinear Acoustical Properties of Perforated Plate Samples and Samples of Aircraft Engine Liners
University essay from KTH/Farkost och flygAbstract : Five samples, three perforated plates and two more realistic samples used in aircraft engine liners have been investigated. All the samples when exposed to high amplitude sound waves show nonlinear acoustic behavior which depends on acoustic velocity at the plate position. READ MORE
