نتایج جستجو برای: sound data
تعداد نتایج: 2491051 فیلتر نتایج به سال:
Background: The sound is an environmental and occupational pollutant and can cause a number of reactions in human body, in which hearing loss is one of the most important effects. Cement industry is one of the industries with noise induced hazards. The aim of this study was to evaluate the noise level in different parts of Kerman Cement Plant. Materials and Methods: This descri...
Abstract Introduction: Sound is one of the most important harmful factors in the work environment. The physiological effects of sound on humans appear gradually in the long run. In spite of industrial progress, exposure to excessive noise is still one of the health problems facing workers in the world. Materials and Methods: This descriptive-cross sectional study was designed and impleme...
Background: Invasive procedures could change the physiological responses of neonates. The present study aimed to evaluate the effect of the sound of the Holy Quran on the physiological responses and pain caused by heel stick blood sampling in neonates. Methods: This three-stage, two-group, clinical trial was conducted on 72 hospitalized term neonates at the neonatal intensive care unit (NICU) ...
Practitioners of computer music often need to store sound as sampled digital data on their computer's hard disks, digital audio tapes (DATs), or compact disks (CDs). The data formats used to represent digitally sampled sound determine the audio quality of the sound capture, the amount of disk or tape needed to store the data, and the ease with which application programs can be developed to mani...
Background and aims: High levels of noise that most operators of agricultural machinery are exposed to for a long time contribute to cause chronic fatigue and irreversible hearing loss. For this reason, occupational health and safety issues related to such machinary should be considered as a key criterion in the design of agricultural machinery and as a critical factor in the acceptance and sal...
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 recogn...
Introduction: noise pollution has a negative effect on physiological parameters, efficiency and auditory system. The aim of this study was to evaluate the performance of a sound screening method for estimating sound risk in small workshops of Hamadan city. Methods: This cross-sectional study was conducted in 22 plants with more than 20 workers. Noise screening was done using a screen...
Sound measured at various points around the environment can be evaluated by a series of multi-pole sources and their acoustic strength can be acquired. In this numerical study, a method, called the inverse method, was examined to achieve this goal. A variety of arrangements of different sources were considered and the acoustic strength of these sources was acquired. Through the application of t...
Underwater sound signals classification, localization and tracking of sound sources, are challenging tasks due to the multi-path nature of sound propagation, the mutual effects that exist between different sound signals and the large number of non-linear effects that reduces substantially the signal to noise ratio (SNR) of sound signals. In the region under observation, the Sado estuary, dolphi...
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