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Pocta, P. (author), Beerends, J.G. (author)
This paper assesses the perceived listening quality of customer support waiting loops using both a subjective experiment as well as an objective perceptual assessment with POLQA (ITU-T Rec. P.863) and VISQOL. A modified version of the methodology defined in the ITU-T Rec. P.835 was derived and used in this paper to subjectively assess the...
article 2019
document
Ebem, D.U. (author), Beerends, J.G. (author), van Vugt, J. (author), Schmidmer, C. (author), Kooij, R.E. (author), Uguru, J.O. (author)
The extent to which the modeling used in objective speech quality algorithms depends on the cultural background of listeners as well as on the language characteristics using American English and Igbo, an African tone language is investigated. Two different approaches were used in order to separate behavioral aspects from speech signal aspects....
article 2011
document
Neerincx, M.A. (author), Cremers, A.H.M. (author), Kessens, J.M. (author), van Leeuwen, D.A. (author), Truong, K.P. (author), TNO Defensie en Veiligheid (author)
This paper presents a methodology to apply speech technology for compensating sensory, motor, cognitive and affective usage difficulties. It distinguishes (1) an analysis of accessibility and technological issues for the identification of context-dependent user needs and corresponding opportunities to include speech in multimodal user interfaces...
article 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
Beerends, J.G. (author), Busz, B. (author), Oudshoorn, P. (author), van Vugt, J. (author), Ahmed, K. (author), Niamut, O. (author), TNO Informatie- en Communicatietechnologie (author)
The authors discuss the way we perceive the quality of a speech signal and how different degradations contribute to the overall perceived speech (listening) quality. More specifically, ITU-T Recommendation P.862 (perceptual evaluation of speech quality-PESQ), which provides a perceptual modeling approach with which the subjectively perceived...
article 2007
document
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
document
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
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
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
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