Pages
- 1
- 2
- document
-
van der Sluis, F. (author), Van Den Broek, E.L. (author), Van Drunen, A. (author), Beerends, J.G. (author)Available bandwidth is still a limiting factor for mobile communication applications. Multisensory communication has already been identified as an possibility to moderate this limitation. One of the strengths of mobile communication lies in its combination of visual and auditory modalities. However, one of the most salient features of mobile...conference paper 2018
- document
-
Počta, P. (author), Beerends, J.G. (author)This paper deals with the intelligibility of speech coded by the STANAG 4591 standard codec, including packet loss, using synthesized speech input. Both subjective and objective assessments are used. It is shown that this codec significantly degrades intelligibility when compared to a standard narrowband filtered version of the synthesized...article 2017
- document
-
Gallardo, L.F. (author), Möller, S. (author), Beerends, J. (author)The performance of automatic speech recognition based on coded-decoded speech heavily depends on the quality of the transmitted signals, determined by channel impairments. This paper examines relationships between speech recognition performance and measurements of speech quality and intelligibility over transmission channels. Different to...conference paper 2017
- document
-
Počta, P. (author), Beerends, J.G. (author)This paper investigates the impact of different telephone channels, represented by impairments as introduced by modern telecommunication networks (e.g. speech coding, bandwidth limitation, packet loss, etc.), on the intelligibility of synthesized speech. Both subjective and objective assessments are used. Two different speech intelligibility...article 2015
- document
-
Beerends, J.G. (author), van Buuren, R. (author), van Vugt, J. (author), Verhave, J. (author), TNO Defensie en Veiligheid TNO Informatie- en Communicatietechnologie (author)The relation between subjective and objective speech intelligibility measurements is researched. For a large series of speech degradations, noise, linear and nonlinear distortions (speech codecs), intelligibility tests were carried out using short CVC words. In the subjective domain the percentage correctly identified words is taken as the...article 2009
- document
-
TNO Informatie- en communicatietechnologie (author), Beerends, J.G. (author), van Buuren, R.A. (author), van Vugt, J.M. (author), Verhave, J.A. (author)Several measurement techniques exist to quantify the intelligibility of a speech transmission chain. In the objective domain, the Articulation Index [1] and the Speech Transmission Index STI [2], [3], [4], [5] have been standardized for predicting intelligibility. The STI uses a signal that contains spectro-temporal characteristics similar to...conference paper 2009
- document
-
van Wijngaarden, S.J. (author), Drullman, R. (author), TNO Defensie en Veiligheid (author)Although the speech transmission index STI is a well-accepted and standardized method for objective prediction of speech intelligibility in a wide range of environments and applications, it is essentially a monaural model. Advantages of binaural hearing in speech intelligibility are disregarded. In specific conditions, this leads to considerable...article 2008
- document
-
Terband, H. (author), Drullman, R. (author), TNO Defensie en Veiligheid (author)A procedure was developed for the automated measurement of the speech reception threshold in stationary noise (SRTn), which can be administered by the subjects themselves using a computer. The procedure was based on the SRTn test for Dutch developed by Plomp and Mimpen [(1979). Improving the reliability of testing the speech reception threshold...article 2008
- document
-
van Wijngaarden, S.J. (author), Verhave, J.A. (author), TNO Defensie en Veiligheid (author)Traffic tunnels are generally hostile acoustic environments, both in terms of reverberation and ambient noise levels. Public address (PA) systems used to convey spoken warnings must meet stringent design requirements in order to produce sufficiently intelligible speech. To be able to predict PA system performance at tunnel design time, two di...article 2006
- document
-
TNO Defensie en Veiligheid (author), Boer, L.C. (author), van Balken, J.S. (author), van Wijngaarden, S.J. (author)De verkeersleider kan weggebruikers in een tunnel aansturen met omroepberichten. De berichten worden van tevoren opgenomen met studiokwaliteit, en vervolgens met één druk op de knop afgespeeld. Automobilisten zullen zon bericht eerder begrijpen; en ook neemt de werkbelasting van de verkeersleider af, hetgeen de veiligheid vooral bevordert bij...report 2006
- document
-
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
- document
-
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
- document
-
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
- document
-
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
- document
-
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
- document
- van Wijngaarden, S.J. (author), Steeneken, H.J.M. (author), Houtgast, T. (author), TNO Technische Menskunde (author) article 2002
- document
-
Steeneken, H.J.M. (author), Houtgast, T. (author)The revised model for the speech transmission index (STIr, Speech Communication 28 (1999) 109), was validated with an independent set of 68 test conditions. For a subset of 18 conditions, including only additive noise and band-pass limiting, it was veri.ed that the STIr provides a good prediction of the CVC-word score. The additional...article 2002
- document
-
van Wijngaarden, S.J. (author), Steeneken, H.J.M. (author), Houtgast, T. (author), TNO Technische Menskunde (author)When listening to languages learned at a later age, speech intelligibility is generally lower than when listening to one's native language. The main purpose of this study is to quantify speech intelligibility in noise for specific populations of non-native listeners, only broadly addressing the underlying perceptual and linguistic processing. An...article 2002
- document
-
van Wijngaarden, S.J. (author), Rots, G. (author), TNO Technische Menskunde (author)Background: Aircrews are often exposed to high ambient sound levels, especially in military aviation. Since long-term exposure to such noise may cause hearing damage, selection of adequate hearing protective devices is crucial. Such devices also affect speech intelligibility. When speech intelligibility and hearing protection lead to conflicting...article 2001
- document
-
van Wijngaarden, S.J. (author)The intelligibility of speech is known to be lower if the speaker is non-native instead of native for the given language. This study is aimed at quantifying the overall degradation due to limitations of non-native speakers of Dutch, specifically of Dutch-speaking Americans who have lived in the Netherlands 1-3 years. Experiments were focused on...article 2001
Pages
- 1
- 2