The Comfort and Effectiveness of Hearing Protection Devices
نویسندگان
چکیده
منابع مشابه
An evaluation of comfort afforded by Hearing Protection Devices
This paper focused on the comfort afforded by 3 models of hearing protection devices. Devices were selected and, after being tested in a real occupational context, evaluated using a questionnaire regarding different comfort indexes. In this way, it was possible to compare the “performance” of the hearing protectors regarding the comfort indexes, and to determine which one, globally, has afforde...
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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 individual workers, and this will improve th...
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this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
learners’ attitudes toward the effectiveness of mobile-assisted language learning (mall) in vocabulary acquisition in the iranian efl context: the case of word lists, audiobooks and dictionary use
رشد انفجاری تکنولوژی فرصت های آموزشی مهیج و جدیدی را پیش روی فراگیران و آموزش دهندگان گذاشته است. امروزه معلمان برای اینکه در امر آموزش زبان بروز باشند باید روش هایی را اتخاذ نمایند که درآن ها از تکنولوژی جهت کمک در یادگیری زبان دوم و چندم استفاده شده باشد. با در نظر گرفتن تحولاتی که رشته ی آموزش زبان در حال رخ دادن است هم اکنون زمان مناسبی برای ارزشیابی نگرش های موجود نسبت به تکنولوژی های جدید...
15 صفحه اولWaking Effectiveness of Emergency Alerting Devices for the Hearing Able, Hard of Hearing, and Deaf Populations
Title of Document: WAKING EFFECTIVENESS OF EMERGENCY ALERTING DEVICES FOR THE HEARING ABLE, HARD OF HEARING, AND DEAF POPULATIONS Erin Mack Ashley Doctor of Philosophy 2007 Directed By: Associate Professor Dr. James A. Milke Department of Fire Protection Engineering The study presented measures the awakening effectiveness of a number of commercially available emergency alerting devices. Three g...
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ژورنال
عنوان ژورنال: Annals of Occupational Hygiene
سال: 2003
ISSN: 0003-4878,1475-3162
DOI: 10.1093/annhyg/meg039