Title :
Assessment of the environmental electromagnetic field by time series of continuous measurements
Author :
Vázquez, Juan ; Olías, Emilio ; Barrado, Andrés ; Pleite, Jorge
Author_Institution :
Dpto. de Tecnologia Electronica, Univ. Carlos III
Abstract :
Continuous measurements of the electromagnetic field strength reveal variations that are not observed in the 6´ average period stipulated in CENELEC ENV 50166-2. Several examples are presented here of prolonged measurements at different places and conditions, using a wide band E field meter. Taking each record as a time series, its power spectra were analyzed by means of wavelets. This showed the existence of several cycles, mainly of 24 hours. These oscillations shows that people are normally exposed to a low level field of amplitude modulated by an extremely low frequency, of which the effects are unknown
Keywords :
biological effects of radiation; electromagnetic fields; field strength measurement; time series; CENELEC ENV 50166-2; continuous measurements; electromagnetic field strength; environmental electromagnetic field; level variation; power spectra; temporal trend; time series; wide band E field meter; Biomedical measurements; Continuous wavelet transforms; Discrete wavelet transforms; Electromagnetic fields; Electromagnetic measurements; Frequency; Geophysical measurements; Time measurement; Time series analysis; Wavelet analysis;
Conference_Titel :
Electromagnetic Compatibility, 2003. EMC '03. 2003 IEEE International Symposium on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-7779-6
DOI :
10.1109/ICSMC2.2003.1428259
