Jérémie Voix

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OBJECTIVES The effectiveness of hearing protection devices (HPDs), when used in workplace conditions, has been shown over the years to be usually lower than the labeled values obtained under well-controlled laboratory conditions. Causes for such discrepancies have been listed and discussed by many authors. This study is an attempt to understand the issues(More)
While hearing protection devices (HPD) have been the last and often only line of defense against noise-induced hearing loss in the workplace, their performance has been suspect. Laboratory evaluations have not proven to predict the actual performance of HPD in the field. Individual fit testing of HPD will allow the determination of HPD performance on(More)
Numerous studies have shown that the reliability of using laboratory measurements to predict individual or even group hearing protector attenuation for occupationally exposed workers is quite poor. This makes it difficult to properly assign hearing protectors when one wishes to closely match attenuation to actual exposure. An alternative is the use of(More)
In this paper, a Voice Activity Detector (VAD) is proposed for smart hearing protection applications where speech is to get through the hearing protector while ambient noise is to be blocked out. The VAD calculates a short-term statistical assessment of the temporal envelopes within different frequency bands. This assessment uses the Inter-Quartile Range(More)
This paper presents a field-microphone-in-real-ear (MIRE) method for the objective measurement of individual earplug field attenuation. This development was made possible by using a recently designed instrumented expandable custom earplug. From the measurement of the noise reduction (NR) through the earplug, this method predicts the attenuation that would(More)
Numerous published studies in the past 20 years clearly demonstrate that use of laboratory measurements to predict real-world attenuation for groups of workers, or even more problematically for individual workers, is fraught with inaccuracies. Thus, the ability to properly assign hearing protectors in critical high-noise environments or even for lower noise(More)
In this paper, we study the possibility of using energy harvesting from ear canal dynamic motion as a source of power to replace the use of batteries for in-ear devices. Two handmade micro-power generators capable of scavenging energy from ear canal deformation are presented in this paper: (1) a hydroelectromagnetic energy harvester and (2) a flexible(More)
The problem of the real-world attenuation of hearing protection devices (HPDs) has been topical and increasingly critical in the European Union (EU) since the implementation of Directive 2003/10/EC, which requires taking “account of the attenuation provided by the individual hearing protectors worn by the worker” (p. 40) [1] to compare noise exposure to the(More)
To enhance the communication experience of workers equipped with hearing protection devices and radio communication in noisy environments, alternative methods of speech capture have been utilized. One such approach uses speech captured by a microphone in an occluded ear canal. Although high in signal-to-noise ratio, bone and tissue conducted speech has a(More)