Searched for: subject%3A%22Speech%22
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van Leeuwen, D.A. (author), Martin, A.F. (author), Przybocki, M.A. (author), Bouten, J.S. (author), TNO Defensie en Veiligheid (author)
In the past years, several text-independent speaker recognition evaluation campaigns have taken place. This paper reports on results of the NIST evaluation of 2004 and the NFI-TNO forensic speaker recognition evaluation held in 2003, and re.ects on the history of the evaluation campaigns. The e.ects of speech duration, training handsets,...
article 2005
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Arlandis, J. (author), Over, P. (author), Kraaij, W. (author), TNO Industrie en Techniek (author)
In this paper, an error analysis based on boundary error popularity (frequency) including semantic boundary categorization is applied in the context of the news story segmentation task from TRECVTD1. Clusters of systems were defined based on the input resources they used including video, audio and automatic speech recognition. A cross-popularity...
conference paper 2005
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Dekker, M.L. (author), de Graaff, M.P. (author), Mast, A. (author), Stassen, L. (author), van der Elst, M. (author), TNO Industrie en Techniek (author)
With a linear array of microphones, 'virtual microphones' can be created with good results on isolating, tracking and separating sources of sound. This technique could be used for command control and speech recognition purposes in an operating theatre.
conference paper 2005
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TNO Defensie en Veiligheid (author), van Gils, B.J.C.M. (author), van Wijngaarden, S.J. (author), van Buuren, R. (author)
Nearly all types of military speech communication involve the use of so-called (narrow band) voice coders or vocoders. Usually the Speech Transmission Index (STI) uses artificial test signals, which can not be reproduced by vocoders with the usual fidelity. Therefore the STI is not able to evaluate vocoders at this time. Although it is...
conference paper 2005
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Abel, S.M. (author), Crabtree, B. (author), Baranski, J.V. (author), Smith, D.G. (author), Thompson, M.M. (author), Steeneken, H.J.M. (author), Verhave, J.A. (author), Buckey, J.C. (author), Alvarenga, D.L. (author), Comtois, J.M. (author), TNO Technische Menskunde (author)
Introduction: Elevated hearing thresholds have been documented in some astronauts after long-term spaceflights although noise levels were lower than those normally associated with noise-induced hearing loss in ground-based operations. The present study was conducted to determine whether prolonged exposure (70 h) to levels (72 dBA) recorded on...
article 2004
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Esch van-Bussemakers, M.P. (author), Cremers, A.H.M. (author)
This paper describes a user walkthrough that was conducted with an experimental multimodal dialogue system to access a multidimensional music database using a simulated mobile device (including a technically challenging four-PHANToM-setup). The main objectives of the user walkthrough were to assess user preferences for certain modalities (speech...
conference paper 2004
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van Wijngaarden, S.J. (author), Bronkhorst, A.W. (author), Houtgast, T. (author), Steeneken, H.J.M. (author), TNO Technische Menskunde (author)
While the Speech Transmission Index ~STI! is widely applied for prediction of speech intelligibility in room acoustics and telecommunication engineering, it is unclear how to interpret STI values when non-native talkers or listeners are involved. Based on subjectively measured psychometric functions for sentence intelligibility in noise, for...
article 2004
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van der Kleij, R. (author), Paashuis, R.M. (author), Langefeld, J.J. (author), Schraagen, J.M.C. (author), TNO Technische Menskunde (author)
This paper examines the conversational process in video-mediated groups as compared to face-to-face groups. In a longitudinal between-groups design, 22 three-person groups were tested in four one-hour test sessions at two-week intervals. In each session, groups had to select and argue the correct answer out of three alternatives from a total of...
article 2004
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Bijl, P. (author), Hogervorst, M.A. (author), Toet, A. (author), TNO Technische Menskunde (author)
We investigate the effect of band-limited masking noise and blur on the minimum contrast required to identify a) military targets, b) the standard MRTD and MTDP four-bar test pattern and c) the TOD equilateral triangle test pattern. First, the image containing the test object was spatially blurred by an amount varying from one pixel up to the...
conference paper 2004
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Kerstholt, J.H. (author), Jansen, N.J.M. (author), van Amelsvoort, A.G. (author), Broeders, A.P.A. (author), TNO Technische Menskunde (author)
An experiment was conducted to investigate the reliability of voice lineups. More specifically, the experiment was designed to look into the effects of retention interval (an immediate test or after a week), speech duration (30 or 70 s) and acoustic environment (indoors or indoors and outdoors) on speaker identification accuracy. In addition,...
article 2004
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Holub, J. (author), Beerends, J.G. (author), Smid, R. (author)
This contribution deals with the estimation of the relation between speech transmission quality and average call duration for a given network and portfolio of customers. It uses non-intrusive speech quality measurements on live speech calls. The basic idea behind this analysis is an expectation that the average call duration is higher for calls...
conference paper 2004
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TNO Technische Menskunde (author), Steeneken, H.J.M. (author), Verhave, J.A. (author)
Active noise reduction is a successful addition to passive ear-defenders for improvement of the sound attenuation at low frequencies. Design and assessment methods are discussed, focused on subjective and objective attenuation measurements, stability, and high noise level applications. Active noise reduction systems are suitable for integration...
article 2004
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van Wijngaarden, S.J. (author), Houtgast, T. (author)
The Speech Transmission Index (STI) is routinely applied for predicting the intelligibility of messages (sentences) in noise and reverberation. Despite clear evidence that the STI is capable of doing so accurately, recent results indicate that the STI sometimes underestimates the effect of reverberation on sentence intelligibility. To...
article 2004
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Reijneveld, S.A. (author), Spee-Van Der Wekke, J. (author), Verloove-Vanhorick, S.P. (author)
Many children with developmental problems, especially with problems in cognition or in social and emotional functioning, go to schools for special education. Whether pupils in special education have more physical limitations, handicaps and other health problems than pupils in mainstream education has not been documented recently. Therefore,...
article 2003
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de Kleine, M.J.K. (author), den Ouden, A.L. (author), Kollée, L.A.A. (author), van der Nijhuis - Sanden, M.W.G. (author), Sondaar, M. (author), Kessel van - Feddema, B.J.M. (author), Knuijt, S. (author), van Baar, A.L. (author), Ilsen, A. (author), Breur-Pieterse, R. (author), Briët, J.M. (author), Brand, R. (author), Verloove-Vanhorick, S.P. (author)
Background: Long term follow up shows a high frequency of developmental disturbances in preterm survivors of neonatal intensive care formerly considered non-disabled. Aims: To develop and validate an assessment tool that can help paediatricians to identify before 6 years of age which survivors have developmental disturbances that may interfere...
article 2003
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TNO Technische Menskunde (author), van Linden, S. (author)
In a natural environment, many events have perceptual consequences in more than one modality. For example, when we hear someone speaking, there is not only auditory information about what is said, but also visual information about where the sound comes from, and phonetic information that can be lipread. It is known that our perceptual system...
doctoral thesis 2003
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TNO Technische Menskunde (author), van Wijngaarden, S.J. (author)
Bij de experimenten is voorbijgegaan aan de dynamische, adaptieve aspecten van spraakcommunicatie: luisteraars geven (bijvoorbeeld door interrupties, of door hun gezichtsuitdrukking) aan wanneer de verstaanbaarheid te wensen overlaat. Sprekers reageren hierop, bijvoorbeeld door duidelijker en langzamer te spreken. Dergelijke effecten zijn niet...
doctoral thesis 2003
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Steeneken, H.J.M. (author), Houtgast, T. (author), TNO Technische Menskunde (author)
In an earlier study we derived robust frequency-weighting functions for prediction of the intelligibility of short nonsense words.These frequency-weighting functions are applied for prediction of intelligibility such as with the speech transmission index (STI).Six independent experiments revealed essentially similar frequency-weighting functions...
article 2002
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Waals, J.A.J.S. (author), Kooi, F.L. (author), Kriekaard, J.J. (author), TNO Technische Menskunde (author)
While speech recognition in principle may be one of the most natural interfaces, in practice it is not due to the lack of user-friendliness. Words are regularly interpreted wrong, and subjects tend to articulate in an exaggerated manner. We explored the potential of visually supported error correction (speech recognition integrated in a...
conference paper 2002
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van Wijngaarden, S.J. (author), Steeneken, H.J.M. (author), Houtgast, T. (author), TNO Technische Menskunde (author)
article 2002
Searched for: subject%3A%22Speech%22
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