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Akustik-Blog

Kategorie: ‘Room Acoustics’

Promotionsprüfung Dipl.-Ing. Lukas Aspöck

17. Juli 2020 | von

Am 10. Juli 2020 hat Herr Lukas Aspöck seine mündliche Promotionsprüfung erfolgreich abgeschlossen.

Herr Aspöck promovierte über das Thema:
„Validation of room acoustic simulation models“

Abstract:

Already in ancient times, the goal existed to design appropriate environments to transport acoustic signals from a sound source to an audience. Strongly connected to this is the interest to understand room acoustic effects and, in the best case, to accurately predict them. This is of particular relevance today in prestigious projects such as the construction of concert halls, but is also of great importance in everyday life, for example in public buildings. Room acoustic simulations based on the concepts of geometric acoustics have been developed for such purposes for more than 50 years and have been extensively investigated. However, there is still insufficient knowledge about the uncertainty and validity of the results of the room acoustic simulations used today. In addition, many highly simplified simulation models are often used without questioning the validity of the results.

In order to offer developers and researchers a possibility to comprehensively validate the results of their room acoustic simulation, a database with eleven different acoustic scenes was developed, documented and published. The scenes cover both simple environments, where individual acoustic effects such as reflection or diffraction are isolated, and complex spatial situations such as a concert hall. In addition to a detailed description and the definition of input data, acoustic measurements were carried out for all scenes, which serve as reference for the simulations.

Furthermore, a study is presented which was designed following the concept of three previously conducted round robin experiments. Here, the simulation results of up to six participants, who were not informed about measurement results in advance, are compared with each other and with the results of the corresponding measurements. The evaluation of the results for the simple scenes reveals various weaknesses of the geometric acoustics, but in the case of the complex scenes it nonetheless shows acceptable results in the medium frequency range. In further investigations it was determined how much room acoustic simulation results deviate from measurements if the user knows the measurement results beforehand and input data of the simulation is adjusted manually or systematically. From these results it can be concluded which deviations from actual, measured values can be expected in the room acoustic simulation of both unknown and known rooms. Furthermore, this work provides a basis for improvements in the field of geometrical acoustics simulation models and with respect to the determination and selection of correct input data for the simulation.

Das ITA gratuliert sehr herzlich!!

Wallace Clement Sabine Award 2018 für Prof. Michael Vorländer

21. November 2018 | von

Die Wallace Clement Sabine Medal der Acoustical Society of America (ASA) wird seit 1957 an Wissenschaftler verliehen, die sich in den Bereichen Raum- und Bauakustik besondere Verdienste erworben haben.

Diese Ehrung wurde bei der letzten ASA-Tagung im November 2018 an Prof. Dr. Michael Vorländer  verliehen.

Medaillenübergabe durch ASA-Präsidentin Lily Wang an Michael Vorländer

 

Das ITA bei den „Highlights der Physik“ in Dortmund

23. Oktober 2018 | von

Nach einer mehrjährigen Pause war das Institut für Technische Akustik im Jahr 2018 wieder bei den „Highlights der Physik“ vertreten.  Mit dieser Veranstaltungsreihe möchte das Bundesministerium für Bildung und Forschung (BMBF) die Öffentlichkeit, insbesondere Schülerinnen und Schüler, mehr für die zahlreichen Themenbereich der Physik begeistern. Gastgeber und Mitorganisatoren der Veranstaltung in diesem Jahr waren die Stadt Dortmund sowie die Technische Universität Dortmund, die sich in den Projekttagen vom 17.9.2018 bis zum 22.09.2018 über rund 48.000 Besucher an den vielen Ständen und Vorträgen freuten.

Das ITA war mit einem Stand zum Thema „Mit zwei Ohren hört man besser“ durch den Mitarbeiter Philipp Schäfer sowie durch die studentischen Mitarbeiter Philipp Eschbach und Pascal Palenda vertreten, welche interessierten Besucher die Grundlagen und aktuelle Forschungsfragen im Bereich des binauralen Hören und der Raumakustiksimulation anschaulich demonstrieren.

Die offizielle Pressemitteilung des Veranstalters finden Sie hier. Vielen Dank an Dr. Axel Carl für die hervorragende Organisation und an die Fotografen von Offer & Offer für die Bereitstellung ihrer Fotos.

 

Acoustic Virtual Reality movies online

23. Februar 2017 | von

On the Acoustic Virtual Reality website three movies have been added that were shown several times at different conferences.

(Copyright ITA)

SEACEN International Round Robin on Auralization

30. September 2016 | von

Researchers of the SEACEN project have officially launched the 1st International Round Robin on Auralization. In this extensive comparison of simulation and auralization tools, researchers, users and developers can contribute their results for nine different acoustical scenes including a variation of simple acoustical situations as well as typical room acoustical scenarios. Everyone is invited to particpate. In the first phase of the Round Robin, participants are ask only to use the provided input data. Deadline for the submission of the results is december 31st, 2016.

More information can be found on the offical Auralization Round Robin website.