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PREDICTION SOUND INSULATION PROPERTIES DIVIDER BUILDING STRUCTURES AND SECURITY ACOUSTIC COMFORT INSIDE BUILDINGS
Berková, Petra ; Katunský,, Dušan (referee) ; Tuza,, Karel (referee) ; Vaňková,, Marie (referee) ; Vlček, Milan (advisor)
This thesis deals with the properties of soundproof partition structures in the low-frequency sound at impact sound insulation and security of acoustic comfort inside buildings. The prediction of impact sound is a simulation laboratory measurements of impact sound. The work is based on the occurrence of frequent complaints of inhabitants of residential homes for subjectively poor impact sound insulation of horizontal dividing structures, whose top layer is formed laminate. Although these structures conform in terms of impact sound insulation in accordance with the requirements of CSN 73 0532: 2010, residents complain about the subjective perception of the sounds of lower frequencies. A noise with a distinctive character of sound at low frequencies has been proved by measuring the spectral analysis and evaluation of sound pressure levels caused by the movement of persons roof construction to the floor. On the measurement and evaluation carried out in accordance with the measurement and evaluation of noise in non-working environment can be related requirement under the Regulation No. 272/2011 Coll. "On the protection of health from the adverse effects of noise and vibration." Occupational noise limits for protected buildings interior space do not apply to noise from ordinary use of the apartment. Under current legislation, the problem is in the Czech Republic at present insoluble. Therefore, this work explores ways evaluation of impact sound and delivery is determined conclusions. With the low-frequency impact sound insulation is also related to the latter part of this dissertation, where the computing program ANSYS (version 14.0) is simulated laboratory measurements of impact sound insulation of the real structure. The paper presents the results of simulation, and the sound pressure level in the receiving room to třetinooktávového band 630 Hz. These results are compared with measured values modeled in the laboratory.
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History and acoustics of traditional timber joist floor structures
Kalousek, Lubor ; Fišarová, Zuzana
The article is focused on the issue of traditional timber joist floor structures, especially from the end of the 19th century to the first half of the 20th century. In common building practice, we very often encounter these structures in residential buildings that are, or were in the past, the subject of structural changes. Unfortunately, during these interventions, the basic ideas of the original technical solution are not always respected and some physical parameters of building are degraded, of which the requirements of building acoustics will be discussed in particular. However, the problem includes not only the actual composition of timber joist floor structure, but also the floor, which forms an integral whole in interaction with it. The article will describe the principles that were devoted to these types of structures in historical legislative and standard regulations and further in professional literature. The original historical solution will be presented on a practical example. In relation to building interventions in historic timber joist floor structures, current legislative and standard regulations will be described, as well as examples of modern solutions and their limitations.
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Concealed damage the ceiling to the floor, or the lack of assessment of impact sound?
Berková, Petra ; Berka, Pavel
Based on the complaints of users apartments was found essential, mainly relating to ceilings to the floor, at which the top layer consists of laminated . Although these structures conform in terms of impact sound , residents have repeatedly complained about the poor acoustic comfort especially in the perception of movement across the floor in a higher floor. Spectral analysis of the noise source (the movement of persons roof construction with floor) were found to be the source of significant noise components in the low frequency range (31,5 to 40) Hz , that is outside the area of impact sound insulation rating per local legislation.
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PREDICTION SOUND INSULATION PROPERTIES DIVIDER BUILDING STRUCTURES AND SECURITY ACOUSTIC COMFORT INSIDE BUILDINGS
Berková, Petra ; Katunský,, Dušan (referee) ; Tuza,, Karel (referee) ; Vaňková,, Marie (referee) ; Vlček, Milan (advisor)
This thesis deals with the properties of soundproof partition structures in the low-frequency sound at impact sound insulation and security of acoustic comfort inside buildings. The prediction of impact sound is a simulation laboratory measurements of impact sound. The work is based on the occurrence of frequent complaints of inhabitants of residential homes for subjectively poor impact sound insulation of horizontal dividing structures, whose top layer is formed laminate. Although these structures conform in terms of impact sound insulation in accordance with the requirements of CSN 73 0532: 2010, residents complain about the subjective perception of the sounds of lower frequencies. A noise with a distinctive character of sound at low frequencies has been proved by measuring the spectral analysis and evaluation of sound pressure levels caused by the movement of persons roof construction to the floor. On the measurement and evaluation carried out in accordance with the measurement and evaluation of noise in non-working environment can be related requirement under the Regulation No. 272/2011 Coll. "On the protection of health from the adverse effects of noise and vibration." Occupational noise limits for protected buildings interior space do not apply to noise from ordinary use of the apartment. Under current legislation, the problem is in the Czech Republic at present insoluble. Therefore, this work explores ways evaluation of impact sound and delivery is determined conclusions. With the low-frequency impact sound insulation is also related to the latter part of this dissertation, where the computing program ANSYS (version 14.0) is simulated laboratory measurements of impact sound insulation of the real structure. The paper presents the results of simulation, and the sound pressure level in the receiving room to třetinooktávového band 630 Hz. These results are compared with measured values modeled in the laboratory.
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