نتایج جستجو برای: combined noise air quality
تعداد نتایج: 1447061 فیلتر نتایج به سال:
Introduction: Various factors affect the employees' health and well-being in the workplace. The present study aimed to examine the outbreak of Sick Building Syndrome (SBS) and the role of factors and parameters affected by the architecture design of Urmia Roads and Urban Development building (e.g., thermal comfort, Indoor Air Quality (IAQ), noise, lighting, layout design-ergonomics, and design ...
In this paper, combined GPS and GLONASS positioning systems are discussed and some solutions have been proposed to improve the accuracy of navigation. Global Satellite Navigation System (GNSS) is able to provide position, velocity and time with respect to coordinated universal time. GNSS positioning is based on received satellite signals, so its performance is highly dependent on the quality of...
Background: Velopharyngeal insufficiency causes hypernasal vocal quality and can also result in audible nasal air emission and difficulty in producing pressure consonants. The resulting speech is often socially unacceptable and can be difficult to understand. Platelet-rich plasma is an autologous derivative of whole blood. Today, the importance of clinical use of Platelet-rich plasma in the pla...
abstract introduction: noise exposure is the most common cause of tinnitus. a comprehensive assessment of tinnitus and its impact on the quality of life cannot be achieved merely by evaluating the psychoacoustic characteristics of tinnitus. this study aimed at exploring the potential relationship between tinnitus psychoacoustic characteristics and the resulting handicap. materials and methods: ...
effects of environmental pollution on job stress in different districts of tehran high schools staff
the aim of this study was to investigate the relationships between air, noise, light and landscape pollution on job stress of staff work in high schools of different districts (1, 2, 10 and 11) of tehran. this stress can reduce the efficiency of the personnel. the number of people participated in this research was 250, selected by random from different schools of the districts. the questionnair...
Problem statement: In speech communication, speech coding aims at preserving the speech quality with lower coding bitrate. When considering the communication environment, various types of noises deteriorates the speech quality. The expressive speech with different speaking styles may cause different speech quality with the same coding method. Approach: This research proposed a study of speech c...
Background and Aim: Little attention has been paid to the effects of combined exposure to noise and vibration. Exposure to noise and vibration can effect stress hormones and may lead to high blood pressure and cardiovascular disorders. This study aims to investigate the effects of noise and vibration on urinary Metanephrine and Normetanephrine among men. Methods: In this experimental study, 30 ...
Introduction: This study was conducted to assess noise pollution in one of thepetrochemical complex andtakepractical measures to reduce it. Thecompanyis located in site 4 of Mahshahr Special Economic Zone. . Method and Materials: In the first phase of the research, environmental noise was measured to determine the noise levelsin the different sections of the plant and also identify the main s...
Around the word, traffic growth is causing growing air and noise pollution. Noise levels in a given area are affected by traffic on the streets as well as effective factors, including existing infrastructure and industrial centers, and so on. The purpose of this research is to model and estimate the amount of acoustic emission in the streets of Tehran's third district, using the 3D spatial info...
Various studies indicate that at the same noise level and during the daytime, annoyance increases in the order of rail, road, and aircraft noise. The present study investigates if the same ranking can be found for annoyance to nocturnal exposure and next day cognitive performance. Annoyance ratings and performance change during combined noise exposure were also tested. In the laboratory 72 part...
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