TY  - JOUR
A1  - Dokhanchi, Najmeh Sadat
A1  - Arnold, Jörg
A1  - Vogel, Albert
A1  - Völker, Conrad
T1  - Measurement of indoor air temperature distribution using acoustic travel-time tomography: Optimization of transducers location and sound-ray coverage of the room
JF  - Measurement
N2  - Acoustic travel-time TOMography (ATOM) allows the measurement and reconstruction of air temperature distributions. Due to limiting factors, such as the challenge of travel-time estimation of the early reflections in the room impulse response, which heavily depends on the position of transducers inside the measurement area, ATOM is applied mainly outdoors. To apply ATOM in buildings, this paper presents a numerical solution to optimize the positions of transducers. This optimization avoids reflection overlaps, leading to distinguishable travel-times in the impulse response reflectogram. To increase the accuracy of the measured temperature within tomographic voxels, an additional function is employed to the proposed numerical method to minimize the number of sound-path-free voxels, ensuring the best sound-ray coverage of the room. Subsequently, an experimental set-up has been performed to verify the proposed numerical method. The results indicate the positive impact of the optimal positions of transducers on the distribution of ATOM-temperatures.
KW  - Bauphysik
KW  - Bauklimatik
KW  - Akustische Laufzeit-Tomographie
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20220524-46473
UR  - https://www.sciencedirect.com/science/article/abs/pii/S0263224120304723?via%3Dihub
VL  - 2020
IS  - Volume 164, article 107934
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Vogel, Albert
A1  - Arnold, Jörg
A1  - Voelker, Conrad
A1  - Kornadt, Oliver
T1  - Data for sound pressure level prediction in lightweight constructions caused by structure-borne sound sources and their uncertainties
JF  - Data in Brief
N2  - When predicting sound pressure levels induced by structure-borne sound sources and describing the sound propagation path through the building structure as exactly as possible, it is necessary to characterize the vibration behavior of the structure-borne sound sources. In this investigation, the characterization of structure-borne sound sources was performed using the two-stage method (TSM) described in EN 15657. Four different structure-borne sound sources were characterized and subsequently installed in a lightweight test stand. The resulting sound pressure levels in an adjacent receiving room were measured. In the second step, sound pressure levels were predicted according to EN 12354-5 based on the parameters of the structure-borne sound sources. Subsequently, the predicted and the measured sound pressure levels were compared to obtain reliable statements on the achievable accuracy when using source quantities determined by TSM with this prediction method.
KW  - Bauakustik
KW  - Körperschall
KW  - building acoustics
KW  - structure-borne sound
KW  - sound pressure level prediction
KW  - structure-borne sound sources
KW  - OA-Publikationsfonds2023
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20230719-64114
UR  - https://www.sciencedirect.com/science/article/pii/S2352340923004110?via%3Dihub
VL  - 2023
IS  - Volume 48, June 2023, article 109292
SP  - 1
EP  - 16
PB  - Elsevier
CY  - Amsterdam
ER  -