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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Förbättring av passivdämpande hörselskydd / Improvement of Passive EarmuffsÖhnström, Magnus, Göhlin, Victor January 2017 (has links)
Magnus Öhnström och Victor Göhlin studenter på Designingenjörsprogrammet vid Högskolan i Skövde har i samverkan med Hellberg Saftey AB studerat förbättringsåtgärder för passivdämpande hörselskydd. Med mål att skapa en grundkåpa som kan anpassas för olika dämpningsgrader. För att uppnå detta har det gjorts en förstudie med en omfattande konkurrentanalys. Uppdraget har inneburit att testa och utvärdera kåpkonstruktion med kåpskal, volymring, tätningsring och absorbent. Från detta dras slutsatser med hjälp av en Akustisk Test Fixtur (ATF) i Hellbergs ljudlabb. Olika förbättringar kombineras till koncept som slutligen skickats till Tyskland för verifikation. Utifrån de erhållna resultaten sker en viss vidareutveckling av volymringen. / Magnus Öhnström and Victor Göhlin are two design engineer students from the University of Skövde. To obtain their bachelor in engineering they have completed a study for Hellberg Safety to improve the sound dampening effect in their passive earmuffs. The goal is a standard shell that can be optimized for different grades of sound dampening. In order to obtain knowledge a pilot study was performed. This included an analysis of one of the major competitor’s products. In order to reach the goal, the shell, absorber and cushion had to be examined. Modifications made were evaluated with an Acoustic Test Fixture (ATF) located in Hellbergs sound lab. Different modifications were combined, evaluated and sent to Germany for further evaluation. From the given results parts of the shell were further developed.
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