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Acoustic Travel-Time Tomography: Optimal Positioning of Transceiver and Maximal Sound-Ray Coverage of the Room
- Acoustic travel-time tomography (ATOM) determines the distribution of the temperature in a propagation medium by measuring the travel-time of acoustic signals between transmitters and receivers. To employ ATOM for indoor climate measurements, the impulse responses have been measured in the climate chamber lab of the Bauhaus-University Weimar and compared with the theoretical results of its imageAcoustic travel-time tomography (ATOM) determines the distribution of the temperature in a propagation medium by measuring the travel-time of acoustic signals between transmitters and receivers. To employ ATOM for indoor climate measurements, the impulse responses have been measured in the climate chamber lab of the Bauhaus-University Weimar and compared with the theoretical results of its image source model (ISM). A challenging task is distinguishing the reflections of interest in the reflectogram when the sound rays have similar travel-times. This paper presents a numerical method to address this problem by finding optimal positions of transmitter and receiver, since they have a direct impact on the distribution of travel times. These optimal positions have the minimum number of simultaneous arrival time within a threshold level. Moreover, for the tomographic reconstruction, when some of the voxels remain empty of sound-rays, it leads to inaccurate determination of the air temperature within those voxels. Based on the presented numerical method, the number of empty tomographic voxels are minimized to ensure the best sound-ray coverage of the room. Subsequently, a spatial temperature distribution is estimated by simultaneous iterative reconstruction technique (SIRT). The experimental set-up in the climate chamber verifies the simulation results.…
Document Type: | Conference Proceeding |
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Author: | M.Sc. Najmeh Sadat DokhanchiORCiD, Dipl.-Ing. Jörg Arnold, Dr.-Ing. Albert VogelGND, Prof. Dr.-Ing. Conrad VölkerORCiDGND |
DOI (Cite-Link): | https://doi.org/10.25643/bauhaus-universitaet.3877Cite-Link |
URN (Cite-Link): | https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20190408-38778Cite-Link |
URL: | https://www.dega-akustik.de/publikationen/online-proceedings/ |
Parent Title (Multiple languages): | Fortschritte der Akustik - DAGA 2019 |
Language: | English |
Date of Publication (online): | 2019/03/31 |
Date of first Publication: | 2019/03/31 |
Release Date: | 2019/04/08 |
Publishing Institution: | Bauhaus-Universität Weimar |
Institutes and partner institutions: | Fakultät Bauingenieurwesen / Professur Bauphysik |
Pagenumber: | 4 |
Tag: | Acoustic Travel-Time Tomography |
GND Keyword: | Bauphysik; Bauklimatik; Akustische Tomographie |
Dewey Decimal Classification: | 600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften / 621 Angewandte Physik |
BKL-Classification: | 56 Bauwesen / 56.55 Bauphysik, Bautenschutz |
Licence (German): | Zweitveröffentlichung |
Note: | This conference paper has been submitted to the DAGA 2019. Thus, the original paper first is published in the "Fortschritte der Akustik - DAGA 2019" |