نتایج جستجو برای: noise control

تعداد نتایج: 1505459  

Ahmadpoor, M, Azam, K, Ghasemi, J, Godarzi, Z, Loni, T, Monazzam, M, Oskouie, F,

Background & Aims: Noise pollution is becoming a severe issue for the patients admitted in intensive care units (ICUs). For the reduction of noise pollution in hospitals, researchers recommend proper training and adherence to protocols. The present study aimed to assess the effect of the training of nurses on the reduction of noise pollution in ICUs. Materials & Methods: This clinical trial wa...

Journal: :health scope 0
sedigheh atrkar roshan department of economic, university of alzahra, tehran, ir iran omran ahmadi department of sciences of occupational health, tarbiat modarres university, tehran, ir iran; department of sciences of occupational health, tarbiat modarres university, tehran, ir iran. tel: +98-9144241240

conclusions since traffic noise pollution is a high cost for tabriz residents, extensive preventive measures and comprehensive control programs by managers and city authorities as unavoidable necessities are suggested. the measures have to be taken by urban managers and decision-makers to reduce the health impact of traffic noise on tabriz residents. background noise pollution is one of the mos...

Hamzavi, Rostam, Younesian,

In recent years, need to increase the convenience of trips in railway vehicles causes that train operators and manufacturers focus on reducing the noise level which is sensed by passengers. In this paper, first the state of modeling acoustic noise in cab train is discussed and natural frequencies and acoustic mode shapes are derived and then formulation of acoustic pressure in the cab will be o...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی 1385

با توجه به اینکه زبان فارسی زبانی نسبتا هجامحور است در این پروژه تقطیع سیگنال گفتار فارسی به واحدهای هجایی مورد توجه قرار گرفته است. هدف از این پروژه آن است که تنها با استفاده از سیگنال گفتار و کمیت های پروزودیک آن، تقطیع به واحدهای هجایی در محیط تمیز و آلوده به نویز با صحت قابل قبولی انجام شود. در این کار ابتدا انرژی زمان کوتاه سیگنال گفتار مورد پردازش قرار گرفته است. روش های مورد استفاده در ...

Journal: :The Journal of the Acoustical Society of America 2016

Journal: :Journal of Vibration and Acoustics 1987

جهانگیری, محمد , علی آبادی, محسن , گلمحمدی, رستم ,

Introduction: The Power plants are as the major industries that have a large number of workers, providing they health is important. Exposure to occupational noise is the pervasive physical agent in industries like power plants and may impact health and for safety status for people. Determination of the sources of noise in workplaces is important step in noise control plans. This study aimed to ...

Journal: :Advances in Mechanical Engineering 2014

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