Essays about: "sound absorbent"
Showing result 1 - 5 of 6 essays containing the words sound absorbent.
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1. The effect of furniture on room acoustic parameters and its dependence on the sound absorbing properties of the ceiling
University essay from Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaperAbstract : In ordinary public rooms such as classrooms and offices, the base line of acoustical treatment is an absorbent suspended ceiling. Due to the non-uniform distribution of the absorptive ceiling material, the scattering as well as the absorption properties of furniture will have a significant effect on room acoustic parameters such as reverberation time, speech clarity and sound strength. READ MORE
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2. Attenuation of fan noise with passive methods : An experimental study in the implementation of a ducted fan inside the body of a blended wing body UAV
University essay from KTH/Skolan för teknikvetenskap (SCI)Abstract : This report is about a novel approach to attenuation of fan noise in aerial vehicles, by way of implementing a ducted fan in the chassis of a four meter blended wing body plane. Three different one meter PVC pipes were used and their performances as silencers were tested by measuring the sound power level and calculating the insulation loss compared to a fan by itself. READ MORE
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3. 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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4. Bicomponent Fiber in Sound Absorbent Production : Investigation of using bicomponent fiber as adhesive between woven and nonwoven textile and how it affects the sound absorption
University essay from Högskolan i Borås/Institutionen TextilhögskolanAbstract : A new way of adhering woven textile to a nonwoven backing was explored, the end product in mind being a sound absorbent panel. Today a hot melt adhesive is sprayed on the nonwoven with woven decorating textile put on top before compression molding. READ MORE
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5. Acoustic properties of porous materialsused in silencers
University essay from KTH/Farkost och flygAbstract : The aim of this master thesis is an experimental investigation of the acoustic characteristics of absorbing materials used in mufflers for trucks and cars. The difference in the composition between different wool type materials consists of difference in material, fibre diameter, length, density and fibre orientation. READ MORE