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Quality and Usability LabChristine Kühnel

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Christine Kühnel



Christine Kühnel has been working as phd student and researcher (Wissenschaftlicher Mitarbeiter) at the Quality and Usability Lab of Deutsche Telekom Laboratories, TU-Berlin from 2007 to 2011. In 2011 she finished her PhD on the topic "Quantifying quality aspects of multimodal interactive systems'.

Since December 2011 she is working at Potsdam-Institut for Climate Change Research (PIK) as scientific coordinator.


You can find her new contact details here:



Assessment of the Speech-Quality Dimension "Noisiness" for the Instrumental Estimation and Analysis of Telephone-band Speech Quality
Citation key scholz2008a
Author Scholz, Kirstin and Kühnel, Christine and Wältermann, Marcel and Möller, Sebastian and Heute, Ulrich
Title of Book Proceedings of the Interspeech 2008 incorporating SST 2008
Pages 703–706
Year 2008
ISSN 1990-9772
Location Brisbane, Australia
Address Brisbane, Australia
Month sep
Publisher International Symposium on Computer Architecture (ISCA)
Abstract The development of instrumental measures that do not only estimate the speech quality of modern telecommunication sys tems but also analyze it is a current issue in speech pro- cessing. Our work aims at an analytic quality measure for telephone-band speech that is based on the instrumental assessment of so called quality dimensions. They describe different quality-relevant characteristics of speech signals and thus allow for a quality analysis. An overall-quality rating is ob- tained by a suitable combination of the dimension ratings. For telephone-band speech, three quality dimensions have been identified: "directness/frequency content", "continuity", and "noisiness". This paper presents an estimator for "noisiness" that is based on three parameters: the level and the color of ad- ditive noise contained in a speech signal as well as its amount of signalcorrelated noise. The dimension estimates show a correlation > 0.95 with the results of auditory tests.
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