نتایج جستجو برای: loudness level and sound pressure level
تعداد نتایج: 16965466 فیلتر نتایج به سال:
background: noise is one of the most important harmful agents in work environment. noise pollution in oil refinery industries is related to workers' health. this study aimed to determine the overall noise pollution of an oil refinery operation and its frequency analysis to determine the control plan for a vent noise in these industries. methods: this experimental study performed in control unit...
Background: Today, the effects of environmental pollution on human life and human needs, which reduces the level of community health caused by traffic noise in large cities, are clearly visible by creating irritation and pathogenic conditions. The aim of this study was to assess the risk of noise pollution resulted from central traffic in Shiraz by analyzing its indicators and related componen...
Background and Objectives: Noise pollution is one of the most harmful physical factors in working environments in developed and developing countries, which has significant impacts on the workers’ quality of life. The aim of this study was to investigate mental and physiological effects of chronic exposure to noise. Methods: This is a cross-sectional study carried out randomly in 2018 on 250 wo...
Pipa is one of the most important Chinese traditional plucked instruments, but its directivity has never been measured systematically. In western, directivity of loudness for western instruments is deeply researched through analysis of sound pressure level, whereas the directivity of timbre is seldom studied. In this paper, a new method for directivity of timbre was proposed, and horizontal dir...
abstract this quasi-experimental study was aimed at examining the impact of storyline complexity on the grammatical accuracy and complexity of advanced and intermediate efl learners. a total of 65 advanced and intermediate efl learners were selected from iran language institute (ili). an intact group including 35 intermediate participants and another intact group with 30 advanced participants ...
today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...
Phonation threshold pressure has been defined as the minimum subglottal pressure to generate phonation. Previous research has indicated that children may habitually employ higher subglottal pressures than adults. In the present investigation sound pressure level (SPL) and subglottal pressures at different pitch levels were measured at and above phonation threshold in nine children. Phonation th...
Introduction: Noise is an environmental stressor and can cause or exacerbate mental disorders along with other stressors, and even affect the individual performance in certain conditions. The aim of this study was to evaluate the combined effects of noise and smoking on cognitive performance of the workers in an automotive industry. Methods: This is a descriptive-analytical study with cross-se...
The protection of human rights and just welfare are Indonesia's orientation as a rule law country. In line with developments civilization, parade activities that should show our customary wealth cultural identity beginning to be eroded by sound system parades which tend cause social problems in society, conflicts even physical damage health caused the loud powerful system. purpose this study is...
In this keynote, relations between psychoacoustics, sound quality, and music are discussed. In the domain of psychoacoustics, a Dynamic Loudness Model (DLM) is presented which can simulate loudness perception of sounds with strong temporal structure for both normal hearing persons and persons with (slight) hearing deficits. Recent results on the hearing sensation pitch strength will be presente...
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