Heart Rate Of Human Body Research Articles

Experimental Research on the Influence of Short-Term Noise Exposure on Miners’ Physiology

Coal mine noise affects human physiology, psychology, and behavior. It causes errors at work and increases accidents. In this study, we built a coal mine noise simulation experiment system. The system not only included an experimental environment simulation system and a physiological indicator test system, but it also added a miners’ working simulation system. This paper aimed to study the effect of different short-term (25 min) noise levels (60 dB, 70 dB, 80 dB, 90 dB, and 100 dB) on human physiology (skin conductivity and heart rate). Critical analysis showed that the stronger the noise intensity is, the shorter the contact time it takes for physiological indicators to present significant changes, and by setting different noises and measuring the skin conductivity and heart rate of human body, it was concluded that the noise level should be reduced to 90 dB to reduce accidents of miners.

Digital Wavelet Filter for Noise Elimination on Heart Rate Variability Analysis

In this paper, the electrocardiograms measurement circuit boards (produced by ZhongYu Technology Company) was used to measure the signal of heartbeat by pasting electrode patches on the limbs. The heartbeat signal is sampled at 500 Hz with data acquisition card (National Instruments) and recorded in the computer. Since the signals recorded in computer would be deteriorated by noise, we prefer to utilize a digital wavelet filter to replac e the General IIR digital filter for the superior noise filteri ng performance. For the extraction of characteristic values, the So and Chan Method is implemented to find Q wave, R wave and S wave. The interval of two R peaks could be measured and calculated to show the heart rate of human body. HRV (heart rate variability) analysis of the human body can then be performed and regarded as the reference for diagnosis of disease.