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ArAc- Multibook of Architectural Acoustics KU Leuven
© 2015 Published by Elsevier Ltd. This presentation introduces a didactic tool ArAc-Multibook of Architectural Acoustics (an interactive publication) whose main objective is to innovatively fill the gap in technical literature and to increase architects' awareness about the role acoustic comfort plays in the life of human beings. The ArAc project demonstrates an innovative approach to education and professional development of architects in the ...
Applied Building Physics: Ambient Conditions, Building Performance and Material Properties: Second Edition KU Leuven
© 2016 Wilhelm Ernst & Sohn, Verlag für Architektur und technische Wissenschaften GmbH & Co. KG. All rights reserved. Bad experiences with construction quality, the energy crises of 1973 and 1979, complaints about 'sick buildings', thermal, acoustical, visual and olfactory discomfort, the need for good air quality, the move towards more sustainability, all have accelerated the development of a field, which for a long time was hardly ...
Determining radiated sound power of building structures by means of Laser Doppler vibrometry KU Leuven
This paper introduces a methodology that makes use of laser Doppler vibrometry to assess the acoustic insulation performance of a building element. The sound power radated by the surface of the element is numerically determined from the vibrational pattern, offering an alternative for classical microphone measurements. Compared to the latter the proposed analysis is not sensitive to room acoustical effects. This allows the proposed methodology ...
Assessment of the sound reduction index of building elements by near field excitation through an array of loudspeakers and structural response measurements by laser Doppler vibrometry KU Leuven
At low frequencies the assessment of the sound reduction index of building elements in the laboratory according to the standard ISO 10140-2:2010 is burdened by a large variation in the measurement results. This is due to the fact that at low frequencies the acoustic field is not sufficiently diffuse. This paper discusses a measurement procedure in which a diffuse field is created in the source room by means of an array of loudspeakers positioned ...
Building Physics KU Leuven
This book is intended for students of architecture and civil engineering and focuses on Environmental Acoustics in Architectural design. The focus lies on two main goals. (1) To provide a reasonable reduction of unwanted sounds, noise and vibrations (also called noise control) and (2) to ensure the most favourable conditions for generation, transmission and perception of desirable sounds (mostly speech or music) inside buildings or outdoors. ...
A measurement campaign for railway-induced vibrations in a building KU Leuven
In October 2016, an extensive field measurement campaign was conducted at a site in Belgium where a threestorey building with a basement is located 33m from a railway line that is used by both freight and passenger trains. Over a period of eleven days, the dynamic response in the free field and the building was measured simultaneously, resulting in a database of over 500 train passages. Nine measurement locations were used in the free field, and ...
Building Physics: Heat, Air and Moisture: Fundamentals and Engineering Methods with Examples and Exercises: Second Edition KU Leuven
Bad experiences with construction quality, the energy crises of 1973 and 1979, complaints about 'sick buildings', thermal, acoustical, visual and olfactory discomfort, the need for good air quality, the move towards more sustainability, all have accelerated the development of a field, which until some 40 years ago was hardly more than an academic exercise: building physics. Building physics combines several knowledge domains such as heat and ...
Radiated sound power estimates of building elements by means of laser Doppler vibrometry KU Leuven
The measurement of the sound reduction index R of building elements is typically performed according to ISO 10140, by measuring the sound pressure level in the sending and receiving room, using standardized loudspeaker-microphone instrumentation. Recent proposals for new building acoustic standards taking into account frequencies down to 50 Hz, provoke new questions. At low frequencies (depending on the dimensions of the rooms), the modal ...
An inverse force measurement method to determine the injected structure-borne sound power from an installation into a building element KU Leuven
In structure-borne sound problems in buildings, knowledge of the contact forces between vibrating equipment and a receiving element is often required. When multiplying these forces with the simultaneously measured velocities at the contact points of the equipment, the structure-borne sound power can be determined, which is the quantity governing the sound energy transfer from a source space to a receiving space. Measuring contact forces directly ...