Search for dissertations about: "non-locally reacting"
Found 2 swedish dissertations containing the words non-locally reacting.
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1. Analysis of Acoustic Absorption with Extended Liner Reaction and Grazing Flow
Abstract : Acoustic absorbing liners are efficient and commonly used measures to reduce sound levels in many fields of application. The sound reducingperformance of the liners is dependent on the acoustic state, defined by e.g. the flow and sound field interacting with the liner. READ MORE
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2. Absorption Characteristics of Periodically Perforated Suspended Ceilings
Abstract : The sound absorption characteristics of resonant absorbers, implemented as perforated suspended inner ceilings attached with thin porous layers, are investigated. Several existing theories model the principal absorption mechanisms, but the interaction with the outer sound field influences the absorption in ways that can be modelled with new approaches. READ MORE