Ok. So in terms of microteslas, would it be normal to measure in excess of 1500 from a smart TV that is turned off? If so, what would be inside the TV that would cause this observed measurement to manifest?Drakkith said:Microteslas are a unit of measurement for magnetic field strength, which isn't something 'emitted' in the usual use of the word. For EM radiation we typically use units of power or energy, like Watts or Joules. In terms of power emitted as non-infrared EM radiation, the amount emitted when a TV is turned off is going to be substantially less than the power draw the TV has when turned off (since most TV's are in 'standby' mode, not actually turned off). If the standby power draw is, say, 5 Watts, then almost all of that power is lost as heat transfer to the air or as IR radiation. A very tiny amount is turned directly into EM radiation through non-heat related radiative effects.
You beat me to it.Vanadium 50 said:A loudspeaker, which your TV likely has, would probably be more.
Generally, EMF refers to low frequency electromagnetic fields such as those surrounding an active AC wire. Most communication devices such as your smart television and telephone receive and transmit radiofrequency (RF) radiation that can be detected with a variety of handheld devices.ChrisCOD said:Hello. I have a quick question in regards to EMF radiation.
If loudspeakers were responsible, would you expect uniform measurement either side of the smart TV? Would you be able to review my video on youtube which shows this and give me your view?Vanadium 50 said:As said before, Teslas have pretty much nothing to do with radiation.
10,000 uT is about the field strength of a refrigerator magnet.
A loudspeaker, which your TV likely has, would probably be more.
ChrisCOD said:If loudspeakers were responsible, would you expect uniform measurement either side of the smart TV? Would you be able to review my video on youtube which shows this and give me your view?
There is one important point that should be made here. The term "radiation" actually implies energy being launched out into space and being lost to the system. However, the levels of local energy can be a lot higher than the radiated energy. It all comes down to the phase angle between the E and the H fields. Locally, they are mostly in quadrature and the energy is reactive but, after a wavelength or so, the reactive energy is diminished and then radiated energy (in which the remaining vectors E and H are in phase) is all that's left. We then treat the structure as an 'aerial' and the radiated power depends more on the actual size of the structure. For a badly built mains transformer, the local leakage field can be very high and easy to measure but, after a few wavelengths ( many tens of km) the actual energy radiated is tiny. (I'm not referring to the inverse square factor here but the mode change of the field oscillations.)ChrisCOD said:Hello. I have a quick question in regards to EMF radiation. In particular, I would like to know what quantity of microteslas a smart TV would emit. In particular, would it be unusual for a smart TV to emit in excess of 1000 microteslas even when turned off? Thanks.
Vanadium 50 said:As said before, Teslas have pretty much nothing to do with radiation.
10,000 uT is about the field strength of a refrigerator magnet.
A loudspeaker, which your TV likely has, would probably be more.
Drakkith said:First and foremost, the "Detected High Radiations" warning is downright wrong. There is no radiation coming from that TV (other than regular IR due to its temperature). You are reading the magnetic field, not the emitted radiation. I think your app is trying to fool you into thinking that its beeping and warning message means it has detected something dangerous. It has not.
Also, what units was the 2nd app using?
Overall I didn't see anything worrying. Those magnetic field strengths, even if true for the 1000+ microTesla readings, are not a concern.
So the microtesla count is not a concern. But what would be inside the smart TV to cause that measurement? The only thing that I have come across is the internal speakers, because they apparently contain magnets. The only problem is that the microtesla count is non uniform on either side of the TV. This is repeatable, which is something I dont think you would expect if it was the speakers.Drakkith said:First and foremost, the "Detected High Radiations" warning is downright wrong. There is no radiation coming from that TV (other than regular IR due to its temperature). You are reading the magnetic field, not the emitted radiation. I think your app is trying to fool you into thinking that its beeping and warning message means it has detected something dangerous. It has not.
Also, what units was the 2nd app using?
Overall I didn't see anything worrying. Those magnetic field strengths, even if true for the 1000+ microTesla readings, are not a concern.
ChrisCOD said:So the microtesla count is not a concern. But what would be inside the smart TV to cause that measurement? The only thing that I have come across is the internal speakers, because they apparently contain magnets. The only problem is that the microtesla count is non uniform on either side of the TV. This is repeatable, which is something I dont think you would expect if it was the speakers.
ChrisCOD said:This is repeatable, which is something I dont think you would expect if it was the speakers.
Electromagnetic Field (EMF) radiation is a type of energy emitted by electrical devices, including TVs. It encompasses a range of frequencies, from extremely low frequency (ELF) to radiofrequency (RF) radiation. TVs, especially modern smart TVs, can emit both ELF from their power supplies and RF from their wireless communication modules.
The consensus from scientific research is that the EMF radiation levels emitted by TVs are generally low and within the safety standards set by regulatory bodies like the FCC and ICNIRP. While some studies suggest a potential for biological effects at high levels of exposure, typical usage of TVs does not pose significant health risks according to current evidence.
You can measure EMF radiation from your TV using an EMF meter, a device designed to detect and measure electromagnetic fields. These meters can typically measure both ELF and RF radiation. To get accurate readings, follow the manufacturer's instructions and take measurements at various distances from the TV.
To reduce EMF exposure from your TV, you can take several steps: maintain a reasonable distance from the screen, turn off the TV when not in use, use wired connections instead of wireless ones, and limit the time spent in close proximity to the TV. Additionally, placing the TV in a well-ventilated area can help dissipate any generated EMF.
Yes, there are established guidelines and standards for safe EMF levels. Organizations like the Federal Communications Commission (FCC) in the United States and the International Commission on Non-Ionizing Radiation Protection (ICNIRP) provide safety limits for EMF exposure. TVs sold in most countries must comply with these regulations, ensuring that their EMF emissions remain within safe limits for consumers.