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National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Civic amenities building
 Gyepesová, Angelika ; Svoboda, David (referee) ; Berková, Petra (advisor)
The aim of the diploma thesis is the design of sports centre with nearly zero energy consumption. The thesis is consist of three parts. First part is focused on architectural and structural design. Second part is focused on building services designs. Third part is focused on acoustic assessment of the building. The building is located in Šternberk on a sloping terrain. It has two floors, irregular floorplan and flat roof. The capacity of the building is 104 people. In the building there are rooms for table tennis, spinning, TRX and a gym. There are also massage rooms and a sauna. The building includes a buffet with refreshment and a shop with nutritional supplements. The structural system of building is combined. The structural framework consists of prefabricated columns and beams. The internal and external load-bearing walls are designed from lime-sand blocks and the partition walls are from aerated concrete. The floor and roof structures are designed of prestressed concrete. Heating in the building and the water heating is secured by two ground source heat pump and a stationary condensing gas boiler. Ventilation is provided by air-handling units with heat recovery. Cooling is secured by one of the heat pumps. Electricity consumption is partially covered by photovoltaic panels on the roof. The building has incorporated rainwater storage tank for watering greenery. The third part of this diploma thesis deals with room acoustics and the closely related issue of reverberation. Part of the work is a drafting of acoustic modifications of the sports rooms based on manual calculation. The project aims to improve the acoustic properties of the premises by incorporating elements that have sufficient sound absorption. These are perforated false ceilings, acoustic wooden cladding with different perforations and green walls.
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Measurement of Sound Absorption Coefficient in Impedance Tube
 Jun, David ; Nespěšný, Ondřej
The sound absorption coefficient is one of the most common quantities describing the acoustic behaviour of materials and structures intended for use in room acoustics. This contribution first shows a brief overview of techniques for measuring sound absorption coefficient. Special attention is paid to the impedance tube (often called Kundt tube) group of methods. The following is an introduction to the measurement of the transfer-function method and to a developed impedance tube prototype, including both the hardware assembly and the software implementation of the measurement.
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Vliv čalounických materiálů na akustický komfort v interiéru
 Schmidtová, Terezie
This thesis documents the possibilities of elements application in interiors in order to improve the acoustic characteristics of the space and it analyses the acoustic issues in contemporary interior and factors that affect it. The aim is to compare the acoustic absorption of selected types of filling materials and upholstery composition used in its production. The thesis includes a description of sample preparation, a procedure of measurement in an impedance tube, results processing to determine the sound absorption of tested materials and a measurement of foam cells sizes using microscope and Visiocell program. Acquired values were compared with each other.
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