Informational masking in speech intelligibility tests

Authors

  • Ellen Raben Pedersen The Maersk Mc-Kinney Moller Institute, University of Southern Denmark, Odense M, Denmark
  • Hoda El-Samail Audiology and Logopedics Studies, University of Southern Denmark, Odense M, Denmark
  • Carsten Daugaard DELTA Technical-Audiological Laboratory, Odense C, Denmark
  • Peter Møller Juhl The Maersk Mc-Kinney Moller Institute, University of Southern Denmark, Odense M, Denmark
  • Ture Andersen Institute of Clinical Research, University of Southern Denmark, Odense M, Denmark; Department of Audiology, Odense University Hospital, Odense C, Denmark

Abstract

It is often challenging to separate speech from a noise – especially for hearing-impaired persons. A particular difficult listening situation is when speech is obscured by speech from one or more simultaneous talkers. The purpose of this study is to investigate the effect of informational masking on the speech reception threshold (SRT) and to compare the SRT values obtained with subjective data from the SSQ questionnaire. A listening test was performed with 20 normal-hearing and 20 hearing-impaired subjects. The subjects were presented to the sentences from the Danish speech material Dantale II in four different speech-shaped interfering maskers. The maskers differ regarding fluctuation and to what extent they represent intelligible speech. The listening test shows that the three fluctuating maskers distinguish better between normal-hearing and hearing-impaired subjects than the almost stationary masker. The test-retest variation was found to be the same for the four maskers. The SRT values for the four maskers were generally found not to correlate with the hearing-impaired subjects’ answers to specific questions in the SSQ questionnaire.

References

Brand, T., and Kollmeier, B. (2002). “Efficient adaptive procedures for threshold and concurrent slope estimates for psychophysics and speech intelligibility tests,” J. Acoust. Soc. Am., 111, 2801-2810.

Dreschler, W.A., Verschuure, H., Ludvigsen, C., and Westermann, S. (2001). “ICRA noises: artificial noise signals with speech-like spectral and temporal properties for hearing instrument assessment. International Collegium for Rehabilitative Audiology,” Audiology, 40, 148-157.

DS/EN ISO 8253-3:2012 (2012). Acoustics – Audiometric test methods – Part 3: Speech audiometry, 2nd Ed. (Copenhagen, Denmark).

Gatehouse, S., and Noble, W. (2004). “The speech, spatial and qualities of hearing scale (SSQ),” Int. J. Audiol., 43, 85-99.

Holube, I., Fredelake, S., Vlaming, M., and Kollmeier, B. (2010). “Development and analysis of an International Speech Test Signal (ISTS),” Int. J. Audiol., 49, 891- 903.

Nielsen, J.B., Neher, T., and Dau, T. (2012). “Towards a Danish speech material for speech-on-speech masking investigations,” in Proceedings of ISAAR 2011: Speech perception and auditory disorders. 3rd International Symposium on Auditory and Audiological Research, Nyborg, Denmark. Edited by T. Dau, M.L. Jepsen, T. Poulsen, and J. Christensen-Dalsgaard. ISBN: 87-990013-3-0. (The Danavox Jubilee Foundation, Copenhagen), pp. 175-181.

Schneider, B.A., Li, L., and Daneman, M. (2007). “How competing speech interferes with speech comprehension in everyday listening situations,” J. Am. Acad. Audiol., 18, 559-572.

Wagener, K., Josvassen, J.L., and Ardenkjaer, R. (2003). “Design, optimization and evaluation of a Danish sentence test in noise,” Int. J. Audiol., 42, 10-17.

Additional Files

Published

2013-12-15

How to Cite

Pedersen, E. R., El-Samail, H., Daugaard, C., Juhl, P. M., & Andersen, T. (2013). Informational masking in speech intelligibility tests. Proceedings of the International Symposium on Auditory and Audiological Research, 4, 405–412. Retrieved from http://proceedings.isaar.eu/index.php/isaarproc/article/view/2013-46

Issue

Section

2013/8. Factors influencing speech intelligibility