نتایج جستجو برای: noise standard

تعداد نتایج: 696617  

Journal: :international journal of environmental research 2009
sh. goswami

transportation sector is one of the major contributors to noise in the urban areas. the traffic noise environment in balasore, a city of orissa, india in terms of standard noise indices, community response and community health effects are worked out in the present study. noise pollution is assessed in six different squares (road sections) of the town. it is inferred that the noise levels are mo...

Journal: :journal of occupational health and epidemiology 0
mh sayadi environmental sciences department, university of birjand, iran a movafagh environments and energy department, science and research branch of the islamic azad university, tehran, iran r kargar civil engineering department, university of birjand, iran kh movafagh

background: educational centers have higher standards for controlling noise pollution as it has been shown that noise pollution is a major cause of discomfort for teachers and students. noise pollution reduces concentration, interferes in the conversation, and leads to dropouts and lower grades especially in mathematics. the present study aimed to evaluate noise pollution in the schools of birj...

Journal: :محیط شناسی 0
محمد حسین صیادی اناری استادیار گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه بیرجند افسانه موفق دانشجوی دکتری دانشکدۀ محیط زیست و انرژی دانشگاه آزاد واحد علوم و تحقیقات تهران

introduction noise pollution is one of the environmental pollution that threats public health to the survival of organisms. urban traffic causes noise pollution as a major factor of air pollution. this is one of the problems of urban citizens. this is also a growing problem that has a potential impact on public health, which is mainly resulted from transport vehicles in the cities and the resid...

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...

Journal: :iranian journal of medical physics 0
a. sazgarnia assistant professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. m. h. bahreyni toossi professor, medical physics research center, bu-ali research institute, mashhad university of medical sciences, mashhad, iran. h. moradi m. sc. in in medical physics, mashhad university of medical sciences, mashhad, iran.

introduction: among the environmental pollutions, noise is very important for its physiological  and psychological effects on human. traffic noise is one of the most important pollutants and the  hospitals  are  one  of  the  critical  places  regarding  this  type  of  noise.  for  these  reasons,  in  the  summer  of  1382,  the  traffic  noise  of  mashhad  main  streets  around  the  hospit...

Journal: :Journal of Veterinary Behavior 2021

The aim of this study was to increase knowledge on the genetic background noise reactivity in dogs, with a heritability based owner-collected data standard poodles’ degree fear sudden loud noises and fireworks. Previous studies have shown significant breed differences, we expected find for reactivity. 1148 poodles are included study. estimated heritabilities between 0.09 0.16. Reaction firework...

Journal: :Journal of Magnetic Resonance 2010

Digital image is often degraded by many kinds of noise during the process of acquisition and transmission. To make subsequent processing more convenient, it is necessary to decrease the effect of noise. There are many kinds of noises in image, which mainly include salt and pepper noise and Gaussian noise. This paper focuses on median filters to remove the salt and pepper noise. After summarizin...

ژورنال: طب کار 2016

Introduction: A hospital as a health care institution providing  treatment services can be heavily influenced by sources of noise. Noise pollution has negative impacts on patient comfort and staff welfare. This study aimed to evaluate the relationship between noise annoyance and sensitivity with noise parameters (PNC, SIL) in the hospitals of Behbahan. Methods: This study...

  Background: Educational centers have higher standards for controlling noise pollution as it has been shown that noise pollution is a major cause of discomfort for teachers and students. Noise pollution reduces concentration, interferes in the conversation, and leads to dropouts and lower grades especially in mathematics. The present study aimed to evaluate noise pollution in the schools ...

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