Innovative methods and technologies for spatial listening and speech intelligibility using hearing implants

  • Anja Chillian Fraunhofer IDMT, Ilmenau, Germany
  • Maria Gadyuchko Technische Universit¨at Ilmenau, Ilmenau, Germany
  • András Kátai Fraunhofer IDMT, Ilmenau, Germany
  • Florian Klein Technische Universit¨at Ilmenau, Ilmenau, Germany
  • Thomas Sattel Technische Universit¨at Ilmenau, Ilmenau, Germany
  • Verena Skuk HNO-Klinik, Universit¨atsklinikum Jena, Jena, Germany
  • Stephan Werner Technische Universit¨at Ilmenau, Ilmenau, Germany
Keywords: hearing implants, spatial hearing, listening tests


The proportion of the population with acquired hearing loss is increasing worldwide. Specific types of hearing loss require the treatment with hearing implants. Cochlear implants and bone conduction hearing implants are two examples. The present contribution is a prospect of the underlying project in its early stadium. The project addresses new methods and technologies that improve spatial hearing with such implants. The methods are adjusted specifically for both types of hearing implants. For cochlear implants bioinspired signal processing methods are applied. For bone conduction implants new working principles for mechanical stimulation based on piezoelectric transducers are investigated. To evaluate the developments perceptional experiments are conducted, which investigate spatial hearing and speech intelligibility with normal-hearing and hearing-impaired persons. For this purpose a virtual listening environment is applied to synthesize different room acoustics, source positions, audio signals, and acoustic scenes with different complexity. Cochlear implants and a custom-made bone conduction device are used as playback systems. The bone conduction device generates the mechanical input and transmits mechanical oscillations via the temporal bone to the cochlea. Listening tests assess speech intelligibility with spatially distributed background noise and localization abilities.


Barde, A., Helton, W.S., Lee, G., and Billinghurst, M. (2016) “Binaural spatialisation over a bone conduction headset: Minimum discernable angular difference,” Proc. 140th AES Convention, Paris, France.

Ching, T.Y.C., van Wanrooy, E., and Dillon, H. (2007) “Binaural-bimodal fitting or bilateral implantation for managing severe to profound deafness: A review,” Trends Amplif., 11, 161-192.

Harczos, T., Chilian, A., and Katai, A. (2011) “Horizontal-plane localization with bilateral cochlear implants using the SAM strategy,” Proc. ISAAR, 3, 339-345.

Harczos, T., Chilian, A., and Husar, P. (2013) “Making use of auditory models for better mimicking of normal hearing processes with cochlear implants: The SAM coding strategy,” IEEE Trans. Biomed. Circuits Syst., 7, 414-425.

Harczos, T., Chilian, A., K´atai, A., Klefenz, F., Baljic, I., Voigt, P, and Husar, P. (2013) “Making use of auditory models for better mimicking of normal hearing processes with cochlear implants: First results with the SAM coding strategy,” Proc. ISAAR, 4, 317-324.

Klein, F., Werner, S., Chilian, A., and Gadyuchko, M. (2017) “Dataset of in-the-ear and behind-the-ear binaural room impulse responses used for spatial listening with hearing implants,” Proc. 142nd AES Convention, Berlin, Germany.

Kuhnke, F., Jung, L., and Harczos, T. (2015) “Compensating for impaired prosody perception in cochlear implant recipients: A novel approach using speech preprocessing,” Proc. ISAAR, 5, 309-316.

Levitt, H. (1971) “Transformed up-down methods in psychoacoustics,” J. Acoust. Soc. Am., 49, 467-477. doi: 10.1121/1.1912375

Lindau, A. (2014) Binaural resynthesis of acoustical environments - Technology and perceptual evaluation. Ph.D. thesis, Technische Universit¨at Berlin, Fakult¨at I - Geisteswissenschaften. doi: 10.14279/depositonce-4085

Stenfelt, S., and Zeitooni, M. (2013) “Binaural hearing ability with mastoid applied bilateral bone conduction stimulation in normal hearing subjects,” J. Acoust. Soc. Am., 33, 481-493. doi: 10.1121/1.4807637

Wagener, K., K¨uhnel, V., and Kollmeier, B. (1999) “Entwicklung und Evaluation eines Satztests f¨ur die deutsche Sprache, Teil 1: Design des Oldenburger Satztests,” Zeitschrift f¨ur Audiologie, 38, 4-15.

Werner, S., Klein, F., Mayenfels, T., and Brandenburg, K. (2016) “A summary on acoustic room divergence and its effect on externalization of auditory events,” Proc. 8th International Conference on Quality of Multimedia Experience (QoMEX), Portugal. doi: 10.1109/QoMEX.2016.7498973

Wilson, B.S., Lawson, D.T., Muller, J.M., Tyler, R.S., and Kiefer, J. (2003) “Cochlear implants: Some likely next steps,” Annu. Rev. Biomed. Eng., 5, 207-249.
How to Cite
Chillian, A., Gadyuchko, M., Kátai, A., Klein, F., Sattel, T., Skuk, V., & Werner, S. (2018). Innovative methods and technologies for spatial listening and speech intelligibility using hearing implants. Proceedings of the International Symposium on Auditory and Audiological Research, 6, 343-350. Retrieved from
2017/6. Advances in hearing-instrument features and related effects