نتایج جستجو برای: equivalent noise level

تعداد نتایج: 1367872  

Journal: :jentashapir journal of health research 0
leila ibrahimi-ghavam abadi department of environmental management, ahvaz branch, islamic azad university, ahvaz, ir iran behzad foualdi dehaghi department of occupational health, school of public health ahvaz, jundishapur university of medical sciences, ahvaz, ir iran; department of occupational health, school of public health ahvaz, jundishapur university of medical sciences, ahvaz, ir iran. tel/fax: +98-61337385318 siamak kavoosi department of hse, national iranian drilling company, ahvaz, ir iran

conclusions our results showed that only 17% of the measured points in the oil drilling rig floor were in safe area; 39% were in caution area and 44% were in danger area. in the camp facilities area, 51% of the points were in safe area, 38% were in caution area and 11% in danger area. the main sources of noise exposure in the rig floor area were power generators. materials and methods this was ...

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: :The Journal of the Acoustical Society of America 1969

Journal: Pollution 2016

A four year long research programme divided into four phases has been designed for the first time to assess the combined Noise-Air quality and combined exposure to Noise-Air pollution at the curbside open-air microenvironment of Kolkata city, India. The results and the findings of the different phases of study had already been published. The objective of the review work is to fuse the findings ...

Ahmad Shah Farhat Gholamreza Khademi Masoud Shahabian Masoumeh Roudi

Introduction: The improvement of technology has increased noise levels in hospital Wards to higher than international standard levels (35-45 dB). Higher noise levels than the maximum level result in patient’s instability and dissatisfaction. Moreover, it will have serious negative effects on the staff’s health and the quality of their services. The purpose of this survey is to analyze the leve...

A four year long research programme divided into four phases has been designed for the first time to assess the combined Noise-Air quality and combined exposure to Noise-Air pollution at the curbside open-air microenvironment of Kolkata city, India. The results and the findings of the different phases of study had already been published. The objective of the review work is to fuse the findings ...

Journal: :journal of occupational health and epidemiology 0
a ahmadi orkomi graduate faculty of environment, university of tehran, tehran, iran. b tavakoli a noorpoor graduate faculty of environment, university of tehran, tehran, iran.

background : cement industry has many process units. basically all of these units can be considered as a source of noise. since noise pollution is defined based on its offensive hearing effects, the importance of the noise sources depends directly on the number of workers in the unit.   materials and methods : an experimental study has been done at tehran cement factory to recognize and analyze...

Introduction and Purpose: Noise pollution is one of the important environmental problems that has been on a growing trend in the recent years. This study was conducted to evaluate the level of noise pollution in Omidiyeh city, Iran. Methods: Testo 815 sound level meter was employed to quantify the sound pressure level (SPL). The measurements were conducted during 7-9 am, 12- 14 am, and 19-21 pm...

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