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4g off, wifi on, smart cover on. Actually trying to listen to speaker closely and noticed warmth from the iPad. To get a better feel for the warmth, put cheek on back of iPad. Got a small headache afterwards, which isn’t worrisome by itself. I didn’t think anything of it until I realized there’s a lot of magnets, etc in there (iPad+smartcover). Any reason to worry? Ughhhh.
Should not be any different than a 4G LTE cell phone. While I won’t hold it that close, your headache was most likely caused by something else (sound not RF).
In 2011, IARC (International Agency for Research on Cancer) has classified mobile phone radiation on the IARC scale into Group 2B - possibly carcinogenic. Here is what WHO is really saying “A large number of studies have been performed over the last two decades to assess whether mobile phones pose a potential health risk. To date, no adverse health effects have been established as being caused by mobile phone use.” from here Radio frequency exposure limits for mobile phone users are given in terms of Specific Absorption Rate (SAR) Health Canada’s guidelines place a limit of 1.6 W/kg for the head and torso and 4.0 W/kg for the limbs. US SAR limits are the same as Canadian SAR limits. Here is a list of 20 phones and their SAR level. Remember these are in watts per KG . Now for your iPad, check the info on page 4 on this document You can clearly see that the highest amount of SAR is at the 2400–2483.5 Mhz range with an SAR of only 0.99 W/Kg. For more research into this you should check on here. Looks to me like you are pretty safe using your iPad without an aluminum hat. Hope this helps, good luck.
It actually can cause harm if safety guidelines are not followed. The iPad may become excessively warm during use.(Especially iPad 3 or 4 with screen brightness turned way up) Skin contact to the warm area for extended period of time may cause low-temperature burns, it’s kind like boiling a frog with warm water, when you actually find out that you are burned, the damage is already done. So do as the user’s manual said, avoid touching warm areas of the iPad. It has nothing to do with the RF, though. Cellular or Wi-Fi/Bluetooth RF signals do not cause any harm, any claims for harm are BS. iPads pass all FCC regulations and there are extra measures to prevent excessive RF absorption. All iPads have proximity sensors inside the cellular antenna so when you touch the antenna window, they automatically reduce transmit power. This is the reason why Apple can make the antenna a hand-holding area with your hand literally all over it and still passes all RF regulations.
I think the radiation of the Ipad and afcourse WIFI caused the headache. WIFI is a danger to mankind and will cause canser in the longterm. At this moment the WHO, World health orhganisation placed has microwafe radiation in 2011 on 2B carcinogenic. Work with cables Best regards, Mirza
