Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as InternetDrafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use InternetDrafts as referen...

diesel exhaust particles are a complex mixture of thousands of gases and fine substances that contain more than 40 different environmental contaminants. being exposed to these exhaust particles (called soot) can cause lung damage and respiratory problems. diesel particulate filters are used in many countries for mobile sources as a legal obligation to decrease harmful effect of these fine parti...

The exposure-response relationships for road traffic noise annoyance in Vietnam were proposed according to over 4700 responses obtained in Hanoi, Ho Chi Minh, Da Nang, Hue and Thai Nguyen. However, the variation of the exposure-response curves found among the five cities implied that discrepancies could occur between different geographic regions like the north and the south of Vietnam. To asses...

Non-acoustic speech sensors can be employed to obtain measurements of one or more aspects of the speech production process, such as glottal activity, even in the presence of background noise. These sensors have a long history of clinical applications and have also recently been applied to the problem of denoising speech signals recorded in acoustically noisy environments (Ng et al 2000 Proc. In...

The aeronautic, aerospace and automotive industries require improved noise reduction techniques to meet the current normative and increase the acoustic comfort at acceptable cost. The aim of this work is to investigate the capabilities of inverse methods for the noise source reconstruction of ducted acoustic sources in a laboratory acoustic facility installed in a semi anechoic chamber. Model-b...

School teachers have an elevated risk of voice problems due to the vocal demands in the workplace. Studies suggest that male and female teachers respond differently, which may explain why female teachers have an elevated risk for vocal disorders. Presented will be an amalgamation of two studies investigating gender differences in voice use in the school setting. In the first study, 57 teachers ...

This paper examines the role of policy in coordination environments such as currency crises and bank runs by introducing signaling in a global game. While exogenous asymmetric information has been shown to select a unique equilibrium, we show that the endogenous information generated by policy interventions leads to multiple equilibria. Multiplicity obtains even in environments where the policy...

We make a comparison of the mesopelagic sound scattering layers (SLs) in two contrasting optical environments; the clear Red Sea and in murkier coastal waters of Norway (Masfjorden). The depth distributions of the SL in Masfjorden are shallower and narrower than those of the Red Sea. This difference in depth distribution is consistent with the hypothesis that the organisms of the SL distribute ...

This work aims at presenting the experience of the authors in applying the “product sound quality” approach to the noise signals recorded at the operator station of some earth moving machines (EMMs) in order to improve the acoustic comfort for the operator. For industrial products, the concept of “product sound quality” was defined by Blauert and Jekosch as “...a descriptor of the adequacy of t...