Kategorie: ‘Technical Acoustics’
Promotionsprüfung Dipl.-Ing. Lukas Aspöck
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!!
GfTA Studienpreise 2019 für Johannes Imort und Lukas Vollmer
Auf der gestrigen Weihnachtsfeier des ITA wurde von der Gesellschaft für Technische Akustik e.V. (GfTA) je ein Preis für eine herausragende Bachelorarbeit und eine herausragende Masterarbeit vergeben. Die Preisträger sind dieses Jahr Johannes Imort und Lukas Vollmer. Wir sagen natürlich herzlichen Glückwunsch!
- Johannes Imort, Bachelorarbeit zum Thema „The Directional Energy Decay Curve in Reverberation Rooms / Die richtungsabhängige Nachhallkurve in Hallräumen“ im Lehrstuhl für Technische Akustik betreut durch Marco Berzborn.
- Lukas Vollmer, Masterarbeit zum Thema „Evaluierung räumlicher Lautsprecherwiedergabeverfahren für Anwendungen mit Hörgeräten / Evaluation of loudspeaker-based spatial audio reproduction methods for hearing aid applications“ im Lehr- und Forschungsgebiet für Medizinische Akustik betreut durch Florian Pausch und Michael Kohnen.
ACOUCOU: Development of web-based teaching materials for acoustics
More than one year ago, the polish company KFB Acoustics initiated a Strategic Partnership involving four European universities (KU Leuven, University of Le Mans, University of Zagreb and RWTH Aachen University) and two companies (HEAD Acoustics and KFB Acoustics), funded by the Erasmus+ program of the EU, with the goal to develop ideas and concepts for the implementation and extension of an online teaching portal including various courses on acoustics. This portal, called ACOUCOU, short for Acoustic Courseware, is available on www.acoucou.org and currently contains one course about Vibroacoustics and example materials from the previous project Acoustics for Industry (ACI).
At the end of October, two ITA employees participated in the final meeting in Wroclaw, Poland, where the outcomes of the project and future events related to the ACOUCOU platform were discussed. The most recent event, an interactive session on educational materials in acoustics, which took place at the ICA conference in Aachen, was rated as a great success by all participants and led to new contacts and helped to disseminate the teaching portal.
The project consortium is also happy to announce that additional funding was granted by the EU to fill the teaching portal with more course contents in a three-year project starting in 2020. This project is named Acoustics Knowledge Alliance (ASKNOW) and is part of the Erasmus+ Knowledge Alliance program.
Final meeting in Wrocław, Poland
(Photo: Karolina Jaruszewska)
Final meeting in Wrocław, Poland (Photo: ITA) 
Overview of project partners 
Example of web-based teaching material from the course Acoustics for Engineers (ACE)
Follow updates of the ACOUCOU initiative on social media channels: Facebook – Twitter – Instagram
GfTA Studienpreise 2018 für Jonas Förster und Saskia Wepner
- Jonas Förster, Bachelorarbeit zum Thema „Direction of Arrival Estimation of Early Reflections Using Compressive Sensing / Schätzung der Einfallsrichtung früher
Reflexionen mittels Compressive Sensing“ im Lehrstuhl für Technische Akustik betreut durch Marco Berzborn.
Foto: Florian Pausch
- Saskia Wepner, Masterarbeit zum Thema „Influence of subject movement on the measurement of individual Head-Related Transfer Functions / Einfluss von Probandenbewegungen auf die Messung individueller Außenohrübertragungsfunktionen“ im Lehr- und Forschungsgebiet für Medizinische Akustik betreut durch Jan-Gerrit Richter.
Foto: Florian Pausch
ITA zu Besuch am LVA der UFSC in Florianópolis, Brasilien
Im Rahmen des vom Deutschen Akademischen Austauschdienst (DAAD) geförderten PROBRAL-Projektes „Development and integration of computer models to simulate and evaluate hearing aids and cochlear implants and their components and to aid in fitting procedures“ besuchten Prof. Janina Fels, Prof. Michael Vorländer, Lukas Aspöck und Florian Pausch die Universidade Federal de Santa Catarina (UFSC) in Florianópolis, Brasilien. Prof. Stephan Paul führte durch das im Jahre 1980 gegründete Laboratório de Vibrações e Acústica (LVA, http://lva.confd.com.br/en/) des Departamento de Engenharia Mecânica (EMC, http://emc.ufsc.br/portal/) und präsentierte die sehr gut ausgestatteten Laborräume, die unter anderem auch im PROBRAL-Projekt für Experimente genutzt werden.
Im Laufe des Aufenthaltes kam es zudem zu einem spontan organisierten ITA-Alumni-Treffen bei denen zahlreiche Gäste, Studierende, und ehemalige Mitarbeiter des Institutes anwesend waren.
-
- Logo Centro Tecnológico da UFSC
-
- Prof. Janina Fels mit Prof. Andrey da Silva, Prof. Stephan Paul und Prof. Julio Cordioli vom LVA, UFSC
-
- Hallraum des LVA, UFSC
-
- Reflexionsarmer Raum mit Aufbau zur Untersuchung von Strömungslärm
-
- Gruppenbild beim ITA-Alumni Treffen
Das ITA auf der DAGA 2018 in München
Auch dieses Jahr fährt das Institut für Technische Akustik wieder zur DAGA Tagung, die dieses Mal in München stattfindet. Wir bringen uns wie üblich mit wissenschaftlichen Beiträgen ein.
Chronologische Auflistung der Vorträge
Angaben ohne Gewähr
| Wann? | Name | Titel | Raum | Str. Sitzung |
|---|---|---|---|---|
| Dienstag
14:40-15:00 |
Jan Richter | The audible influence of different rotation speeds during continuous HRTF measurements | Interim 1 | Neue Trends beim VAE-Rendering mit Kopfhörern 1 |
| Dienstag
17:00-17:20 |
Hark Braren | Untersuchungen zur Wahrnehmbarkeitsschwelle bei Änderung der Mittenfrequenz von Einbrüchen im Frequenzgang von Außenohrübertragungsfunktionen | Interim 1 | Neue Trends beim VAE-Rendering mit Kopfhörern 1 |
| Dienstag
17:20-17:40 |
Michael Kohnen | Just noticeable notch smoothing of head-related transfer functions | Interim 1 | Neue Trends beim VAE-Rendering mit Kopfhörern 1 |
| Mittwoch
09:00-09:20 |
Jens Mecking | Einfluss von Wettermodellen auf die Auralisierung von Flugzeugen | Interim 1 | Virtuelle Akustik 1 |
| Mittwoch
09:20-09:40 |
Mohammad Imran | Auralization of airborne sound transmission for coupled rooms in virtual reality | Interim 1 | Virtuelle Akustik 1 |
| Mittwoch
10:20-10:40 |
Florian Pausch | Speech reception thresholds of children and adults with hearing loss, ADHD and CAPD in a virtual acoustic environment | MW 1450 | Audiologische Akustik – Sprache und Perzeption |
| Mittwoch
14:20-14:40 |
Mark Müller-Giebeler | Psychoakustische Untersuchung simulierter elektrischer PKW-Antriebe | MV 0001 | Fahrzeugakustik 2 |
| Mittwoch
15:20-15:40 |
Lukas Aspöck | Eine Datenbank zur Validierung von akustischen Simulationen | Interim 1 | Virtuelle Akustik 2 |
| Mittwoch
18:00-18:20 |
Margret Engel | Investigation of the relationship between acoustic perception and thermal comfort of an urban park in Aachen | MW 0350 | Psychoakustik 3 |
| Mittwoch
18:00-18:20 |
Karin Loh | Classification of Rooms in Educational Buildings using different Noise Indicators | MW 1801 | Raumakustik 2 |
Poster
Angaben ohne Gewähr
| Mittwoch
16:00 – 16:40 |
Marco Berzborn | Investigations on the Diffuseness of Wave Fields in Reverberation Rooms | Posterinsel J | Akustische Messtechnik und Sensorik (Poster) |
| Mittwoch
16:00 – 16:40 |
Johannes Klein | Continuous Directional Room Impulse Response Measurements | Posterinsel B | Virtuelle Akustik (Poster) |
| Mittwoch
16:00 – 16:40 |
Jonas Stienen | Real-time auralization of propagation paths with reflection, diffraction and the Doppler shift | Posterinsel B | Virtuelle Akustik (Poster) |
| Mittwoch
16:00 – 16:40 |
Josefa Oberem | Experiments on localization accuracy with non-individual and individual HRTFs comparing static and dynamic reproduction methods | Posterinsel A | Binauraltechnik (Poster) |
| Mittwoch
16:00 – 16:40 |
Janina Fels | Comparison of the front-back confusion rate of individual and individualized head-related transfer functions | Posterinsel A | Binauraltechnik (Poster) |
| Mittwoch
16:00 – 16:40 |
Rhoddy Viveros Munoz | Assessment of individual head-related transfer function and undirected head movements of normal listeners in a moving speech-in-noise task using virtual acoustics | Posterinsel G | Audiologische Akustik (Poster) |
Poster von Gastwissenschaftlern des ITA
Angaben ohne Gewähr
| Mittwoch
16:00 – 16:40 |
Josep Llorca Bofí | Generation of Architectural Designs Using Soundscapes: First Findings | Posterinsel F | Psychoakustik 2 / Soundscapes (Poster) |
| Mittwoch
16:00 – 16:40 |
JianLiang Gao | Applicability Analysis of the Revised Acoustic Energy Model for Concert Auditoriums to Predict Energy Relations in a Theatre | Posterinsel D | Raumakustik (Poster) |
Das ITA auf der DAGA 2017 in Kiel
Wie üblich war das ITA auch dieses Jahr wieder auf der DAGA vertreten, die dieses Jahr in in Kiel stattfand.
Insgesamt beteiligten wir uns an 17 Vorträgen und Postern quer durch die Bandbreite der Medizinischen und Technischen Akustik. Hier einige Impressionen
(Bilder Copyright Jonas Stienen)
Acoustic Virtual Reality movies online
On the Acoustic Virtual Reality website three movies have been added that were shown several times at different conferences.
(Copyright ITA)
ITA stellt Boost Projekt zu „Experiments on the perception of complex listening scenarios of children with hearing loss complemented by fNIRS measurements“ auf RWTHtransparent vor
Am 27.01.2017 stellte das ITA das BOOST Projekt „Experiments on the perception of complex listening scenarios of children with hearing loss complemented by fNIRS measurements“ auf RWTHtransparent vor.
Das Projekt unter der Leitung von Univ.-Prof. Dr.-Ing. Janina Fels ist ein interdisziplinäres Forschungsprojekt gefördert vom Exploratory Research Space unter Beteiligung der Uniklinik der RWTH Aachen in Zusammenarbeit mit Univ.-Prof. Dr. rer. nat. Kerstin Konrad, Univ.-Prof. Dr. med. Christiane Neuschaefer-Rube und Univ.-Prof. Dr. rer. nat. Michael Vorländer.
[huge_it_gallery id=“5″]
Gesellschaft für Technische Akustik e.V. verleiht Studienpreise 2016 für die beste Bachelor- und Masterarbeit
Die Gesellschaft für Technische Akustik e.V. (GfTA) hat im Rahmen der Weihnachtsfeier am Institut für Technische Akustik die Studienpreise 2016 für die beste Bachelor- und Masterarbeit am ITA im WS 2015/16 und SS 2016 verliehen.
Preisträger waren:
Marcel Czaplinski
für seine herausragende Bachelorarbeit
„Unsicherheiten von Raytracing-Ergebnissen in Abhängigkeit von Simulationsparametern“
für seine herausragende Masterarbeit
„Analyse und Morphing monauraler Eigenschaften individueller Außenohrübertragungsfunktionen“
edX meets TU9 – Join the communication acoustics course!
The institute of technical acoustics joins in an massive open online course (MOOC). This course will start on december the fifth and will give an introduction into the fundamentals of acoustics and various applications. The course is provided on edX and is therefore open to everyone. The lecturer are acoustics experts from leading universities all over germany, the so called TU9 universities.
Information about the course and a short video teaser can be found here.
SEACEN International Round Robin on Auralization
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.
-
- Simple reflection scene
-
- Room acoustics measurement Berlin chamber music hall
-
- Measurement of binaural impulse responses using FABIAN dummy head
More information can be found on the offical Auralization Round Robin website.
Akustik-Forschung- Aachen Acoustics Colloquium 2023 Aspöck, Lukas
- Research trip to Santiago de Chile Fels, Janina