Medizinische Physik / Medical Physics and Acoustics // Psychologie/Psychology

#14 Comparing speech intelligibility in a real and virtual living room

Hauptautor*innen: Julia Schütze / Kirsten C. Wagener

Co-Autor*innen: Christoph Kirsch, Stephan D. Ewert, Birger Kollmeier

Abstract:

By applying the subject-in-the-loop methods and the model-in-the-loop framework of the CRC HAPPAA, project C4, that is represented by this poster, aims at personalizing hearing devices and therefore at increasing the individual benefit and rehabilitation success from their usage. We consider the ecological validity of laboratory-based procedures that should be representative for real life by applying authentic laboratory or virtual environments.
In daily-life, a highly relevant environment is the living room, where typical speech communication scenarios involve different target or interferer sources on a sofa or chair, a TV, set or in an adjacent room. Therefore, within the CRC, we built the living room lab, i.e., a laboratory for listening experiments which represents an average German living room and a virtual representation of this living room lab, the “virtual twin.” Together with its virtual twin it provides a unique opportunity to investigate the validity of lab-based virtual reality measures in comparison to a very realistic daily life scene, i.e., a real living room.
In this poster, speech intelligibility measurements in the living room lab as well as in the virtual twin with normal-hearing listeners are presented and compared.

#15 CRC 1330 Hearing acoustics: Perceptual principles, Algorithms and Applications (HAPPAA)

Hauptautor*innen: Prof. Dr. Volker Hohmann (Coordinator)

Co-Autor*innen: Dr. Jörn Anemüller (Scientific Manager) and Dr. Karin Klink (Project Manager)

Abstract:

The Collaborative Research Centre (CRC) "Hearing Acoustics: Perceptive Principles, Algorithms and Applications" (HAPPAA for short) explores the principles of human speech communication. The CRC investigates the acoustic communication loop between the sound field, the hearing device, the perception of the user and its activity, taking it into account for auditory modeling as well as for the development and evaluation of hearing devices, consumer electronics, and assistive listening devices. In addition, the CRC uses lab-based assessment procedures with virtual acoustics to ensure ecological validity of the results, i.e., functioning of the systems in a wide range of real-life environments of different acoustic complexity. To achieve these goals, the CRC links different disciplines that contribute to the research field, i.e., acoustics, psychoacoustics, audiology, engineering and physical modelling.

The CRC is funded by the German Research Foundation (Deutsche Forschungsgemeinschaft) and has been recently granted a second funding period until 2026.

#25 Why are there good days and bad days for hearing? The role of personality in day-to-day hearing fluctuations

Hauptautor*innen: Inka Kuhlmann

Co-Autor*innen: Giulia Angonese, Christiane Thiel, Birger Kollmeier, & Andrea Hildebrandt

Abstract:

Everyday communication not only relies on audibility of speech. Also intelligibility must occur for communication to be successful. Hearing ability thus reflects speech intelligibility which is not a fully stable neurosensory and cognitive process, but it varies from day-to-day within the same individual. However, individuals differ in the amount of their day-to-day hearing fluctuations. These fluctuations can be partly explained by the average hearing ability of individuals. Furthermore, other between the person variables like the personality profile, especially neuroticism and extraversion, have been shown to be related with hearing difficulties and outcomes of hearing aid uptake and therefore could be associated with hearing fluctuations as well. To investigate whether hearing fluctuation depend on personality traits, younger normal hearing adults (N=19) and elderly hearing-impaired adults with (N=45) and without (N=115) hearing devices were repeatedly tested in three ecological momentary assessment studies. A series of personality questionnaires and cognitive tasks were applied. Afterwards, hearing performance was measured 2-3 times a day for 2-4 weeks. Variance heterogeneous linear mixed effects models indicated reliable within-person fluctuations in hearing and introversion was identified as a protective factor against hearing fluctuations. These studies inform hearing health care about individualized approaches to hearing aid fitting.

#26 Auditory attention in workplace-related complex sound environments

Hauptautor*innen: Marc Rosenkranz

Co-Autor*innen: Timur Cetin; Verena Uslar; Dirk Weyhe; Martin Bleichner

Abstract:

In demanding work situations (e.g., during a surgery) the processing of complex soundscapes varies over time and can be a burden for the medical personnel. Here we study, using electroencephalography (EEG), how humans process workplace-related auditory scenes while performing a complex audio-visual-motor task (3D Tetris). Specifically, we want to know how the attentional focus (either narrow or wide) changes the processing of the acoustic scene as a whole. Participants played a game of 3D-Tetris (implemented in MATLAB) in which they had to use both hands to control the falling blocks. At the same time, participants listened to a complex auditory scene, similar to what is found in an operation theatre (i.e., sound of machinery, people talking in the background, alarm sounds, and instructions). Participants had to react to some instructions (e.g., "place the next Block in the upper left corner") and to additional sounds depending on the experimental condition. In this within-subject design, participants either had to only react to a specific alarm sound originating from a fixed point in space ("narrow attentional focus") or they had to react to a sound that had no specific origin and that required the participants to monitor multiple different sound streams ("wide attentional…

#27 Perception-based noise dosimetry: Using mobile ear-EEG to study sound annoyance in daily life

Hauptautor*innen: Martin G. Bleichner

Co-Autor*innen: Manuele Jäger

Abstract:

Eine dauerhafte Belastung durch Alltagsgeräusche (z.B. Verkehrsgeräusche) kann selbst bei geringer Lautstärke chronischen Stress auslösen und somit zu gesundheitlichen Problemen (z.B. Schlafprobleme oder Herz-Kreislauf-Erkrankungen) führen. Ob und welche Alltagsgeräusche als störend wahrgenommen werden, ist individuell sehr unterschiedlich und wird unter Umständen nicht bewusst wahrgenommen.
Mittels mobiler Ohr-basierter Elektroenzephalographie (EEG) untersuchen wir die Verarbeitung von Geräuschen auf neuronaler Ebene im Alltag über mehrere Stunden (> 5 Std.) hinweg. Dafür haben wir die nötige Hardware (cEEGrid, nEEGlace) und Software (AFEx, Android App zur synchronisierten Aufnahme von Akustik Featuren) entwickelt mit der wir Langzeit-EEG aufnehmen können. Ähnlich wie bei einem Langzeit-EKG erlaubt es unserer Ansatz Messungen jenseits des Labors durchzuführen und damit ein realistischeres Bild neuronaler Prozesse zu erhalten. Ein besonderer Augenmerk unserer Forschung liegt dabei auf der Entwicklung von Methoden um das EEG Signal zuverlässig interpretieren zu können.

#86 Computergestützte Qualitätssicherung im Bereich der Leichtionen-Teletherapie am Beispiel von C12

Hauptautor*innen: Pascal Saße

Co-Autor*innen: Prof Dr Björn Poppe und Dr Hui Khee Looe

Abstract:

Ionenbasierte Teletherapie ist ein rasant wachsendes Feld der Teletherapie. Während das kurative Potential dieser Technik bereits weitgehend verstanden ist, fehlt es noch an einer vollständigen Parametrisierung der physikalischen Teilprozesse und an experimentellen Daten. Ziel dieser Arbeit ist es, in Geant4 die Interaktionen der Ionen zu simulieren und dadurch experimentelle Qualitätssicherung zu unterstützen.
Eine zentrale Bedeutung für die dosimetrische Überprüfung hat das Verhältnis von Massenstoßbremsvermögen in Wasser und Luft. Dieses Verhältnis wird in Anlehnung an die DIN 6800-1 durch Computersimulationen basierend auf Teilchenfluenzen bestimmt. Aus diesem Verhältnis wird der Korrekturfaktor für die Strahlenqualität bestimmt, welcher grundlegend für spätere Messungen ist. Weiter wird ein, in DIN 6800-1 beschriebenes, experimentelle Setups unter dem Gesichtspunkt des vorgeschriebenen Rückstreumaterials analysiert. Durch diese weiterführenden Simulationen mit unterschiedlichen Mengen an Rückstreumaterial wird unter Betrachtung der Teilchenfluenzen die notwendigen Phantomgeometrien ermittelt.
Die Ergebnisse, die in diesem Projekt erlangt werden, könnten eine Prozessoptimierung sowohl im Bereich der Computergestützten als auch bei der experimentellen Qualitätssicherung ermöglichen. Des Weiteren werden wichtige Daten zur Ermittlung von dosimetrisch bedeutsamen Korrekturfaktoren erlangt.

 

(Stand: 31.05.2022)