This study use noise and vibration analytical system to test and analyze the noise and vibration of subway station hall, draw the conclusion: analysis the noise test results when the vehicles through the subway station hall. The noise rises as the frequency increases, gets the peak value nearby 5000 Hz, the high of test point gives lesser influence to noise contribution. The vibration occurred ...

Background The learning environment dramatically affects the learning outcomes of students. Noise, inappropriate temperature, insufficient light, overcrowded classes, misplaced boards and inappropriate classroom layout all make up factors that could be confounding variables distracting students in class. This study was conducted to examine the effect of noise in educational institutions on the ...

  Background: It has been prover that the prevalence of experiencing job related stress is very high among the dentists. This stress can be the result of factors such as poor lightening of dental office and noise. This stress can cause emotional distress and threaten dentists’ physical health and affect the quality of their life. This study is conducted to determine dentists’ p...

This paper presents a new pseudopin assignment (PPA) algorithm with crosstalk noise control in multilayer gridless general-area routing. We propose a two-step approach that considers obstacles and minimizes the weighted sum of total wire length and the estimated number of vias under crosstalk noise constraints. We test our algorithms on a set of MCM examples and a set of standard-cell examples....

noise is a type of energy when exceeds t.l.v., it can cause hearing loss, especially in working environments. as factory workers are at high risk of noise, the present study evaluated the bistoon tile factory workers hearing losses. in this analytical cross-sectional study, workers’ noise leq were calculated according to i.s.o. standards and their audiometry results were derived from their heal...