Abstract
The intensity of electromagnetic radiation around selected mobile phones is in a bid to confirm their adherence to the specified radiofrequency exposure limit on non-ionizing radiation. Measurements were taken with the use of Radiofrequency Meter (RF) TM-96, 9V DC and Spectrum Analyzer (NA-773, 144/430 MHz) at distances 5 cm, 10 cm, 15 cm, 20 cm, 25 cm and 30 cm from the mobile phone users. The level of radiations from the selected mobile phones ranges from 0.3119 to 0.5407 mW/cm2 during dialing. Out of the tested mobile phones, the radiation levels of Asus, Infinix 3 and Siccoo X100 phones which are 0.5407, 0.5009 and 0.4506 mW/cm2 respectively are above the International Commission on Non-ionizing Radiation Protection (ICNIRP) reference level which is 0.45 mW/cm2. Result from measurement showed that high radiation levels from a transmitting handset occur between seeking for connection and call establishment. It was also confirmed that the physical condition of mobile phones affects its radiation level.
Highlights
Mobile telephony has rapidly become the most popular method of voice communication in the world and in Nigeria the use of mobile phones has greatly increased which has increased the people’s exposure to radiofrequency radiation from mobile phones
These results shows the presence of different levels of Radiofrequency Meter (RF) radiations from all the selected mobile phone models, ranging from 0.3119 to 0.5407 mW/cm2 during dialing, with the highest radiating mobile phone being Asus while the least is Samsung S7
This is attributed to adaptive power control (APC) which minimizes the power radiation of mobile phone during call conversation
Summary
Mobile telephony has rapidly become the most popular method of voice communication in the world and in Nigeria the use of mobile phones has greatly increased which has increased the people’s exposure to radiofrequency radiation from mobile phones. Different handset models with different qualities have introduced into the Nigeria telecommunication market from different mobile phone manufacturers. This has generated many questions on the radiation level transmitted from these cell phones and the possible hazard on the mobile phone users. The same way as microwave oven affect meat by heat and cook it, the same the power from a close cell phone can affect the tissue in the brain if the head is exposed to the mobile phone radiation for long periods of [2]. In [5] it was found that cardiovascular symptoms and perpetual speed in cognition, a study that conclusively indicates that the advert effect of low but extended period of exposure to radiation intensity from cell phone on human being cannot be eliminated. This radiation is emitted not just during active usage, and during standby mode, since the phone is continuously polling for location nearest to the base station [6]
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