Signal Processing

Henning Schepker

 

Contact:

MSc Henning Schepker
Dept. of Medical Physics and Acoustics - Signal Processing Group

University of Oldenburg
D-26111 Oldenburg
Germany

E-mail: henning.schepker(at)uni-oldenburg.de
Tel: +49-441-798 3377
Fax: +49-441-798 3902
Office: W30 (NESSY) 2-213

 
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Biography

Henning Schepker received a Bachelor of Engineering degree in 2011 from Jade University of Applied Sciences Oldenburg and a Master of Science degree in 2012 from University Oldenburg, both in Hearing Technology and Audiology. Since November 2012 he is pursuing a Ph.D degree in the field of acoustic feedback cancellation for hearing aids.

Research Interests

  • Feedback cancellation
  • Signal processing for hearing aids
  • Near-end listening enhancement
  • Speech perception

Teaching

  • Supervising tutor for "Basic Physics Laboratory" (WS12/13, WS13/14)
  • Tutor for "Advanced Topics Speech and Audio Processing" (SS14, WS14/15, WS16/17)
  • Tutor for "Digital Signal Processing" (SS16, SS17)
  • Tutor for "Fortgeschrittenenpraktikum Physik (DSP Blockpraktikum)" (WS14/15)

Journal Papers

  1. J. Rennies, J. Drefs, D. Hülsmeier, H. Schepker, S. Doclo, Extension and evaluation of a near-end listening enhancement algorithm for listeners with normal and impaired hearing, Journal of the Acoustical Society of America, vol. 141, no. 4, pp. 2526-2537, Apr. 2017.
  2. H. Schepker, K. Haeder, J. Rennies, I. Holube, Perceived listening effort and speech intelligibility in reverberation and noise for hearing-impaired listeneres, International Journal of Audiology, vol. 55, no. 12, pp. 738-747, Dec. 2016.
  3. H. Schepker, S. Doclo, Least-squares estimation of the common pole-zero filter of acoustic feedback paths in hearing aids, IEEE/ACM Trans. Audio, Speech and Language Processing, vol. 24, no. 8, pp. 1334-1347, Aug. 2016.
  4. H. Schepker, S. Doclo, A semidefinite programming approach to min-max estimation of the common part of acoustic feedback paths in hearing aids, IEEE/ACM Trans. Audio, Speech and Language Processing, vol. 24, no. 2, pp. 366-377, Feb. 2016.
  5. H. Schepker, J. Rennies, S. Doclo, Speech-in-noise enhancement using amplification and dynamic range compression controlled by the speech intelligibilility index, Journal of the Acoustical Society of America, vol. 138, no. 5, pp. 2692-2706, Nov. 2015.
  6. T. Sankowsky-Rothe, M. Blau, H. Schepker, S. Doclo, Reciprocal measurement of acoustic feedback paths in hearing aids, Journal of the Acoustical Society of America, vol. 138, no. 4, pp. EL399-EL404, Oct. 2015. [-> Link to additional information]
  7. J. Rennies, H. Schepker, I. Holube, B. Kollmeier, Listening effort and speech intelligibility in listening situations affected by noise and reverberation, Journal of the Acoustical Society of America, vol. 136, no. 5, pp. 2642-2653, Nov. 2014.

Peer-reviewed Conference papers

  1. L. T. T. Tran, H. Schepker, S. Doclo, H. H. Dam, S. E. Nordholm, Adaptive Feedback Control using Improved Variable Step-Size Affine Projection Algorithm for Hearing Aids, in Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA-ASC), Kuala Lumpur, Malaysia, Dec. 2017.
  2. H. Schepker, L. T. T. Tran, S. Nordholm, S. Doclo, Combining null-steering and adaptive filtering for acoustic feedback cancellation in a multi-microphone earpiece, in Proc. European Signal Processing Conference (EUSIPCO), Kos Island, Greece, Aug. 2017, pp. 241-245.
  3. F. Denk, S. Vogl, H. Schepker, B. Kollmeier, M. Blau, S. Doclo, The acoustically transparent hearing device: Towards integration of individualized sound equalization, electro-acoustic modeling and feedback cancellation, in Proc. International Workshop on Challenges in Hearing Assistive Technology (CHAT), Stockholm, Sweden, Aug. 2017, pp. 89-94.
  4. H. Schepker, L. T. T. Tran, S. E. Nordholm, S. Doclo, Null-steering beamformer for acoustic feedback cancellation in a multi-microphone earpiece optimizing the maximum stable gain, in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), New Orleans, USA, Mar. 2017, pp. 341-345.
  5. L. T. T. Tran, H. Schepker, S. Doclo, H. H. Dam, S. E. Nordholm, Proportionate NLMS for adaptive feedback cancellation in hearing aids, in Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), New Orleans, USA, Mar. 2017, pp. 211-215.
  6. L. T. T. Tran, H. Schepker, S. Doclo, H. H. Dam, S. E. Nordholm, Improved Practical
    Variable Step-Size Algorithm For Adaptive Feedback Control in Hearing Aids
    , in Proc. International Conference on Signal Processing and Communication Systems (ICSPCS), Surfers Paradise, Gold Coast, Australia, Dec. 2016.
  7. H. Schepker, L. T. T. Tran, S. Nordholm, S. Doclo, A robust null-steering beamformer for acoustic feedback cancellation for a multi-microphone earpiece, in Proc. 12th ITG Conference on Speech Communication, Paderborn, Germany, Oct. 2016, pp. 165-169.
  8. H. Schepker, L. T. T. Tran, S. Nordholm, S. Doclo, Acoustic feedback cancellation for a multi-microphone earpiece based on a null-steering beamformer, in Proc. International Workshop on Acoustic Signal Enhancement (IWAENC), Xi'an, China, Sept. 2016.
  9. H. Schepker, L. T. T. Tran, S. Nordholm, S. Doclo, Improving adaptive feedback cancellation in hearing aids using an affine combination of filters, in Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Shanghai, China, Mar. 2016, pp. 231-235.
  10. L. T. T. Tran, H. H. Dam, H. Schepker, S. Doclo, S. E. Nordholm, Evaluation of two-microphone acoustic feedback cancellation using uniform and non-uniform sub-bands in hearing aids, in Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA-ASC), Hong Kong, Dec. 2015, pp. 308-313.
  11. H. Schepker, D. Hülsmeier, J. Rennies, S. Doclo, Model-based integration of reverberation for noise-adaptive near-end listening enhancement, in Proc. of Interspeech, Dresden, Germany, Sept. 2015, pp. 75-79.
  12. H. Schepker, S. Doclo, Common part estimation of acoustic feedback paths in hearing aids optimizing maximum stable gain, in Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brisbane, Australia. Apr. 2015, pp. 649-653.
  13. H. Schepker, S. Doclo, Estimation of the common part of acoustic feedback paths in hearing aids using iterative quadratic programming, in Proc. International Workshop on Acoustic Signal Enhancement (IWAENC), Antibes - Juan Les Pins, France, Sept. 2014, pp. 46-50.
  14. H. Schepker, S. Doclo, Modeling the common part of acoustic feedback paths in hearing aids using a pole-zero model, in Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Florence, Italy, May 2014, pp. 3693-3697.
  15. H. Schepker, J. Rennies, S. Doclo, Improving speech intelligibility in noise by SII-dependent preprocessing using frequency dependent amplification and dynamic range compression, in Proc. of Interspeech, Lyon, France, Aug. 2013, pp. 3577-3581.
  16. H. Schepker, F. X. Nsabimana, J. Rennies, Non-Intrusive Objective Assessment of Speech Perception in Noisy Classrooms, in Proc. of ITG Conference on Speech Communication, Braunschweig, Germany, Sept. 2012, pp. 215-218.

Conference Abstracts and others

  1. J. Rennies-Hochmuth, H. Schepker, D. Hülsmeier, J. H. Drefs, S. Doclo, Evaluating Near-End Listening Enhancement in Noisefor Normal-Hearing and Hearing-Impaired Listeners, in Acoustics, Boston, USA, June 2017.
  2. H. Schepker, S. Doclo, Acoustic feedback cancellation for a novel multi-microphone earpiece combining null-steering and adaptive filtering, in 44th Erlanger Kolloquium, Erlangen, Germany, Feb. 2017.
  3. J. Rennies-Hochmuth, H. Schepker, D. Hülsmeier, J. Drefs, S. Doclo, Noise-adaptive near-end listening enhancement for normal-hearing and hearing-impaired listeners, in 9th Workshop on Speech in Noise, Oldenburg, Germany, Jan. 2017.
  4. H. Schepker, S. Doclo, Acoustic Feedback Cancellation for a Multi-Microphone Earpiece using a Null-Steering Beamformer, in International Hearing Aid Research Conference (IHCON), Lake Tahoe, USA, Aug. 2016.
  5. J. Rennies, A. Volgenandt, H. Schepker, S. Doclo, Model-based pre-processing of speech for enhanced intelligibility in noise and reverberation, in Proc. of Interspeech - Show and Tell Demonstration, Dresden, Germany, Sept. 2015, pp. 2619-2620.
  6. J. Drefs, J. Rennies, H. Schepker, S. Doclo, Modellbasierte Verbesserung von Sprachverständlichkeit in störgeräuschbehafteter Umgebung, in Fortschritte der Akustik - DAGA 2015, Erlangen, Germany, Mar. 2015, pp. 1031-1034.
  7. D. Hülsmeier, J. Rennies, J. Drefs, H. Schepker, S. Doclo, Evaluation eines Algorithmus zur SII-basierten Sprachverständlichkeitsverbesserung in störgeräuschbehafteter Umgebung mit schwerhörenden Probanden, in Fortschritte der Akustik - DAGA 2015, Erlangen, Germany, Mar. 2015, pp. 154-157.
  8. T. Sankowsky-Rothe, H. Schepker, M. Blau, Reziproke Messung des akustischen Feedbackpfades bei Hörgeräten, in Fortschritte der Akustik - DAGA 2015, Erlangen, Germany, Mar. 2015, pp. 1162-1165.
  9. I. Holube, H. Schepker, K. Haeder, J. Rennies, Listening effort and speech intelligibility in reverberation and noise, in International Hearing Aid Research Conference (IHCON), Lake Tahoe CA, USA, Aug. 2014.
  10. H. Schepker, S. Doclo, Common part modeling of acoustic feedback paths in open-fitting hearing aids, in International Hearing Aid Research Conference (IHCON), Lake Tahoe CA, USA, Aug. 2014.
  11. K. Haeder, H. Schepker, I. Holube, J. Rennies, Zusammenhang von Höranstrengung, Sprachverständlichkeit und STI bei Schwerhörenden, in Fortschritte der Akustik - DAGA 2014, Oldenburg, Germany, Mar. 2014, pp. 431-432.
  12. J. Rennies, H. Schepker, A. Kubiak, S. Doclo, Adaptive Verbesserung der Sprachverständlichkeit und Medienwiedergabe in Fahr- und Verkehrsgeräuschen, in Fortschritte der Akustik - DAGA 2014, Oldenburg, Germany, Mar. 2014, pp. 42-43.
  13. H. Schepker, S. Doclo, Comparison of common part modeling of acoustic feedback paths in hearing aids, in Fortschritte der Akustik - DAGA 2014, Oldenburg, Germany, Mar. 2014, p. 92 (A).
  14. H. Schepker, J. Rennies, S. Doclo, Improving speech intelligibility in background noise by SII-dependent amplification and compression, in Proc. Annual Conference on Acoustics (AIA-DAGA), Merano, Italy, Mar. 2013, pp. 2140-2143.
  15. H. Schepker, J. Rennies, S. Doclo, Improving speech intelligibility in background noise by SII-dependent amplification and compression, in 5th Workshop on Speech in Noise: Intelligibility and Quality, Vitoria, Spain, Jan. 2013.
  16. H. Schepker, J. Rennies, I. Holube, B. Kollmeier, Zusammenhang von Höranstrengung, Sprachverständlichkeit und STI, in Fortschritte der Akustik - DAGA 2012, Darmstadt, Germany, Mar. 2012, pp. 875-876.
  17. H. Schepker, J. Rennies, I. Holube, B. Kollmeier, Kontinuierliche Messung und Vorhersage von Höranstrengung, in Fortschritte der Akustik - DAGA 2011, Düsseldorf, Germany, Mar. 2011, pp. 589-590.

Patent Applications

  1. H. Schepker, J. Rennies, S. Doclo, J. E. Appell, Improving speech intelligibility in background noise by SII-dependent amplification and compression (WO/2014/108222, US/2015/0310875 A1, JP2016-505896A)