Searched for: author%3A%22Verhave%2C+J.A.%22
(1 - 11 of 11)
document
te Raa, L.A. (author), Verhave, J.A. (author), Driessen, F.P.G. (author), Dreschler, J. (author), TNO Defensie en Veiligheid (author)
To improve port security capability there is a need for systems for detection, warning and deterrence of unwanted divers in harbour environments. In a complex environment such as a harbour, these topics present challenging problems and as such are subject to research and development. Already a few dedicated systems are commercially available,...
conference paper 2010
document
Beerends, J.G. (author), van Buuren, R.A. (author), van Vugt, J.M. (author), Verhave, J.A. (author), TNO Informatie en Communicatietechnologie (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
Vos, W.K. (author), Bronkhorst, A.W. (author), Verhave, J.A. (author), TNO Defensie en Veiligheid (author), DenV (author)
Compared to standard earplugs used for hearing protection, electronic pass-through earplugs provide better sound localisation, provided that the bandwidth is sufficiently wide and the earplugs do not change the shape of the pinnae. However, when in addition a helmet is worn that covers the ears, the directional hearing capability might be...
conference paper 2008
document
van Wijngaarden, S.J. (author), Verhave, J.A. (author), TNO Defensie en Veiligheid (author)
conference paper 2006
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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
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TNO Technische Menskunde (author), Bronkhorst, A.W. (author), Verhave, J.A. (author)
Current helmets and hearing protectors interfere with the sound transmission to the ears and therefore affect the perception and localization of speech and other useful sounds. This is can be a serious drawback especially when the person wearing the protection has to operate in complex, unpredictable environments. A novel electro-acoustic system...
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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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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Verhave, J.A. (author), Steeneken, H.J.M. (author), van Wijngaarden, S.J. (author), TNO Technische Menskunde (author)
Actieve geluidsreductie (ANR) is, mits goed toegepast, een waardevolle aanvulling op passieve gehoorbescherming.
article 2002
document
van Wijngaarden, S.J. (author), Verhave, J.A. (author), TNO Technische Menskunde (author)
In het kader van opdracht C98-104 "Predictie spraakverstaanbaarheid tussen personen in de
report 1998
document
van Wijngaarden, S.J. (author), Verhave, J.A. (author), Steeneken, H.J.M. (author), TNO Technische Menskunde (author)
De spraakverstaanbaarheid van het omroepsysteem in de Wijkertunnel wordt bepaald door de eigenschappen van het omroepsysteem, de akoestische eigenschappen van de tunnel en de in de tunnel aanw ezige lawaaibronnen. Het lawaai dat door de aanwezige stuwventilatoren wordt geproduceerd blijkt tot een belangrijke reductie van de...
report 1998
Searched for: author%3A%22Verhave%2C+J.A.%22
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