Latest Talks

Prof. Dr. rer. nat Dr. med. Birger Kollmeiner, Medizinische Physik & Exzellenzcluster Hearing4All, Universität Oldenburg, Germany

Details

  • Date: 03.12.2018
  • Time: 17:15 h
  • Place: Aquarium, Building D, Faculty of Engineering, Kaiserstr. 2., 24143 Kiel

 

Abstract (in German)

Das Verstehen von gesprochener Sprache ist die Grundlage unserer Kultur. Doch was passiert, wenn der Hörsinn nachlässt? Werden wir dank Dauerbeschallung und demographischem Wandel ein Volk von Schwerhörigen? Wie funktioniert unser Gehör und welche technischen Möglichkeiten haben wir zum Ausgleich einer beginnenden, leichten oder massiven Hörstörung?

Der Vortrag gibt einen Einblick in die laufende Forschung und Glanzpunkte des Exzellenzclusters „Hearing4All“. So wird der Bogen von den biophysikalischen Grundlagen des gestörten Hörvorgangs bis zur klinischen Anwendung und zu Hör-Assistenz-Systemen im täglichen Leben gespannt.

Ein Schwerpunkt liegt auf dem Wechselspiel zwischen Hörexperimenten und der darauf aufbauenden Hör-Theorie, die uns mit Methoden des maschinellen Lernens dabei hilft, eine Präzisions-Diagnostik zu erreichen und den Gewinn an Sprachverstehen durch eine Hörgeräte-Versorgung oder ein Hörimplantat genau vorherzusagen.

 

Short biography (in English)

Birger Kollmeier received the Ph.D. degree in physics (supervisor: Prof. Dr. M.R. Schroeder) and the Ph.D. degree in medicine from the Universität Göttingen, Germany, in 1986 and 1989, respectively. Since 1993, he has been a Full Professor of physics at the Universität Oldenburg, Oldenburg, Germany. He is head of the Cluster of Excellence "Hearing4All", director of the Department for medical physics and acoustics at the Universität Oldenburg, and scientific director of the Hörzentrum Oldenburg, HörTech gGmbH and Fraunhofer IDMT division for hearing, speech and audiotechnology.

He supervised more than 65 Ph.D. theses and authored and coauthored more than 300 scientific papers in various areas of hearing research, speech processing, auditory neuroscience, and audiology.

Prof. Kollmeier was awarded several scientific prizes, including the Alcatel-SEL research prize for technical communication, the International Award of the American Academy of Audiology and the German Presidents prize for Science and Innovation. He is Vice Chairman of the European Federation of Audiological Societies, past-president and board member of the German Audiological Society and advisory board member of the German Acoustical Society.

 

Short biography (in German)

Birger Kollmeier studierte Physik (bei Prof. Dr. M.R. Schroeder) und Medizin in Göttingen. Nach Promotion in beiden Fächern (1986 und 1989) und Habilitation in Physik wurde er 1993 an die Universität Oldenburg als Physik-Professur und Leiter der Abteilung Medizinische Physik berufen. Er ist wissenschaftlicher Leiter der Hörzentrum Oldenburg GmbH, seit 2000 Sprecher der Kompetenzzentrum HörTech gGmbH, seit 2008 Leiter der Fraunhofer-Projektgruppe Hör-, Sprach- und Audiotechnologie sowie seit 2012 Sprecher des Exzellenzclusters "Hearing4All".

Er hat bisher über 65 Promotionen betreut und über 300 wissenschaftliche Paper in verschiedenen Bereich der Hörforschung, Sprachverarbeitung, auditorische Neurowissenschaften und Audiologie verfasst.

Prof. Kollmeier wurde mit einer Reihe wissenschaftlicher Preise ausgezeichnet, darunter den Forschungspreis Technische Kommunikation der Alcatel-Lucent-Stiftung, den International Award der American Academy of Audiology und 2012 den Deutschen Zukunftspreis (Preis des Bundespräsidenten für Technologie und Innovation). Er ist Vizepräsident der Europäischen Föderation audiologischer Gesellschaften, ehemaliger Präsident und Vorstandsmitglied der Deutschen Gesellschaft für Audiologie und Beiratsmitglied der Deutschen Gesellschaft für Akustik.

Dr. Tilmann Sander-Thömmes, Physikalisch-Technische Bundesanstalt, Berlin, Germany

Details

  • Date: 23.04.2018
  • Time: 17:15 h
  • Place: Aquarium, Building D, Faculty of Engineering, Kaiserstr. 2., 24143 Kiel

 

German title

Biomagnetische Sensor- und Auswertesysteme - Fortschritt durch einen modularen Ansatz

 

Abstract

In the field of biomagnetism the application of mathematical algorithms has been as important as the hardware itself. Traditionally, the hardware (the sensor Array) was based on superconducting quantum interference devices (SQUIDs) and operated for decades without large modifications. In contrast to that the range of relevant mathematical algorithms increased at a steady pace. This was driven by factors such as an ever increasing PC based computing power, new physiological insights motivating the application of existing algorithms, and the development of new algorithms to test biophysical models among others.

After around three decades of SQUID based Hardware, now new magnetic field sensors with the potential to replace or complement SQUIDs are available or under development. The opportunity for new sensors is the consequence of clinical challenges unsolved by state-of-the art SQUID based systems and due to new technology allowing alternative quantum physics based sensors in a small sized housing. These new sensors often have extra capabilities compared with SQUIDs and naturally some disadvantages. I will illustrate the modular approach using the example of optically pumped magnetometers and the signal processing toolbox FieldTrip.

 

Short biography

Tilmann Sander-Thömmes studied Physics at University of Freiburg and ETH Zürich and graduated there in 1992. He continued to obtain a PhD in solid-state physics at Imperial College in London. Following two post-docs in Berlin he has been working at Physikalisch-Technische Bundesanstalt since 2000 in the laboratory for Biosignals. Since 1998 he is involved with measuring and analysing magnetic brain signals. He is an expert in magnetoencephalography using both SQUIDs and more recently optically pumped magnetometers.

Dr. Jan Abshagen, Wehrtechnische Dienststelle der Bundeswehr für Schiffe und Marinewaffen, Maritime Technologie und Forschung (WTD 71), Kiel Germany

Details

  • Date: 16.04.2018
  • Time: 17:15 h
  • Place: Aquarium, Building D, Faculty of Engineering, Kaiserstr. 2., 24143 Kiel

 

Abstract

Sound can propagate over a large distance in the sea without significant attenuation and is therefore of unique importance in underwater communication, navigation, and detection. Underwater sound is received in these applications with hydroacoustic sensor systems that are often attached to or towed behind a vessel. The turbulent flow that forms around the hull of the moving sensor system induces hydroacoustic noise in the interior that dominates the noise level (and therefore limits the performance) at larger speeds due to the strong speed dependence of flow acoustic sources (e.g. Lighthill’s v8-law). In a series of research cruises in recent years the statistical properties and underlying physical mechanisms of interior hydroacoustic noise induced from outer turbulent flows have been investigated under sea conditions with towed measurement systems. The talk will focus on the spatio-temporal correlation of the turbulent noise sources as well as the filter properties of the mechanical hull structure and the embedded hydrophones. The analysis is predominantly performed in wavenumber-frequency space. New developments in piezoelectric thin-film sensor technology allow in principle the design of specific wavenumber filters for flow noise reduction. The potential of such sensors for future underwater applications is discussed.

 

Short biography

Jan Abshagen is a research scientist in experimental and applied underwater acoustics at the Bundeswehr Technical Center for Ships and Naval Weapons, Maritime Technology and Research (WTD 71) in Kiel. He received his physics degree (Diplom) and his doctorate (Dr. rer. nat) from the University of Kiel in 1996 and 2000, respectively (Supervisor: Prof. G. Pfister, IEAP). From 2000 to 2001 he was a Research Associate at the Department of Physics and Astronomy, University of Manchester (UK), and from 2001 to 2005 at IFM-GEOMAR (SFB 460 Dynamics of Thermohaline Circulation Variability) in Kiel. After that he worked as a scientist in a research project (2005-07) funded by the Bundeswehr Research Institute for Underwater Acoustics and Marine Geophysics (FWG) in Kiel, before he became in 2008 a principal investigator on a DFG-funded temporary position at the Institute of Experimental and Applied Physics, University of Kiel. Later in 2008 he changed permanently to FWG and has worked since the integrating of FWG in 2009 at WTD 71. His research interests are in the area of hydroacoustics, vibroacoustics and flow acoustics, with a focus on flow induced noise in sensor systems, as well as in nonlinear dynamics in fluids and the transition to turbulence. He was the principal scientist in several research cruises.

Dr.-Ing. Vasudev Kandade Rajan, Becker Automotive Systems GmbH, Straubing, Germany

Details

  • Date: 27.11.2017
  • Time: 17:15 h
  • Place: Aquarium, Building D, Faculty of Engineering, Kaiserstr. 2., 24143 Kiel

 

Abstract

The application of active noise cancellation in real-world has not been fully realized yet. From reducing environment noise through the usage of headphones, to engine noise on commercial jets there are a number of use cases. Each of these use case brings its own set of challenges which can be understood only through multi-disciplinary work. One such use case the the reduction of road noise in vehicles. Structure-borne road noise dominates the cabin of modern vehicles. Several road noise cancellation (RNC) prototype systems have been implemented and demonstrated. These systems are based mainly on analog sensors. The placement of these sensors has been so far been based on random optimization methods. In this talk I will talk about the challenges in developing a generic digital RNC system which includes problem analysis, sensor placement, and performance. An adaptive algorithm process the acceleration signals with high convergence and reaction time for various speed and surface ranges, in order to maintain high audible effects for the passengers. Several modern vehicle platforms are integrated with the digital RNC system with ANC microphone at the headliners and the standard audio loudspeaker setup in order to integrate the technology with the existing audio layout of the vehicle.

 

Short biography

Vasudev Kandade Rajan received Bachelors degree in Electronics and Communication from Visvesvaraya Technological University, Bangalore, India. He joined as Project Research Assistant in July 2008 in the Electrical Communication Engineering Dept, Indian Institute of Science, Bangalore. There he worked on performance management of IEEE 802.11 WLANs until Sept 2009. He then went to obtain his Masters degree (MSc.) in Digital Communications, 2011 and PhD degree in Signal Processing, 2017 from Universtiy of Kiel, Germany. Currently he is working in the R&D department of Harman Becker Automotive Systems GmbH, Straubing, Germany.

Website News

14.08.2018: New section about our SONAR "sisters" added.

18.07.2018: New section about our Parkinson voice training game added.

07.07.2018: New lecture Fundamentals of Acoustics by Jan Abshagen added.

03.03.2018: Team wall added.

28.02.2018: News wall added.

Recent Publications

T. O. Wisch, T. Kaak, A. Namenas, G. Schmidt: Spracherkennung in stark gestörten Unterwasserumgebungen, Proc. DAGA, Germany, 2018

J. Sautter, F. Faubel, M. Buck, G. Schmidt: Evaluation of Different Excitation Generation Algorithms for Artificial Bandwidth Extension, Conference on Electronic Speech Signal Processing, 2018, Ulm, Germany (online access)

Contact

Prof. Dr.-Ing. Gerhard Schmidt

E-Mail: gus@tf.uni-kiel.de

Christian-Albrechts-Universität zu Kiel
Faculty of Engineering
Institute for Electrical Engineering and Information Engineering
Digital Signal Processing and System Theory

Kaiserstr. 2
24143 Kiel, Germany

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