The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 7 3 2019 11 26 Level crossing analysis of complex physiologic time series Level crossing analysis of complex physiologic time series 147 150 579 FA M. Boorboor F. Shahbazi Journal Article 2019 11 26   Level crossing is a powerful method for analyzing the random time series. In this paper by introducing this method we investigate the beta noises and represent differences between 1/f noise and white noise and also research the cardiac heart interbeat interval (RR) time series and find clear distinctions between healthy samples and samples with Congestive heart failure (CHF) disease.   Level crossing is a powerful method for analyzing the random time series. In this paper by introducing this method we investigate the beta noises and represent differences between 1/f noise and white noise and also research the cardiac heart interbeat interval (RR) time series and find clear distinctions between healthy samples and samples with Congestive heart failure (CHF) disease. https://ijpr.iut.ac.ir/article_579_258be18e31c8188555c2ff05b4d542c3.pdf