Is NdFeB magnet harmful to people?

The magnetic induction intensity of ordinary magnets is not high and will not cause harm to the human body. If you 've been working on a part for a long time and it's still being studied, it's as mysterious as acupuncture, as if it's more mysterious than acupuncture. but dueThe CRT is generated by scanning the electron current under the deflection of the magnetic field, thus causing interference to the CRT.

The applied magnetic field distorts the magnetic field in the imaging tube, causing the electron flow to deviate from the normal scanning trajectory. Cause image distortion(black and white and color display) and mottling (color display only). General multimedia speakers use magnetic shielding technology, placed next to the CRT will not cause any impact, but take out the speaker magnet to scan the CRT will see a significant effect. However, it will not cause any damage to the service life of the CRT, at most it is only a long-term image distortion caused by a single point burn.

If the image is still deformed after the magnet is removed, it is because the metal palette on the inner surface of the picture tube is magnetized. As long as the demagnetization function of the display is turned on and the demagnetization is removed, the old display needs to be turned on and off several times. For qualified hard drives, the magnetic shielding technology is quite high. You can't destroy it from the outside through a magnetic field. Experts have calculated that if the magnetic field reaches this strength, it will be enough to suck all the iron out of your body.

Floppy disks and tapes are what we should really pay attention to, but it is true who still uses floppy disks to manage their bank cards (with magnetic stripes on them). For the motherboard or anything else, you do not need to be careful what the bad consequences will be. My former friend mentioned that the problem of mobile phone calls is not because of the magnetic field, but because of the change of the electromagnetic field. The changing electromagnetic field radiates electromagnetic waves into the surrounding space, while the magnet generates a constant magnetic field that does not radiate electromagnetic waves outward. Needless to say, the current electromagnetic signals interfere with the electromagnetic compatibility of home appliances. These concepts are mainly aimed at problems such as electromagnetic wave pollution to the power grid, rather than human health problems.

The telephone is placed next to the tape recorder, which makes a lot of noise when making a call, much worse than a short-wave radio. As for the computer, I haven't tried it or seen it. One day we'll try. But I don't think it's anything, unless the machine is too bad. Microwave(high frequency electromagnetic wave) harm to people around the world is still stepping up research, what is the mobile phone radiation standards, there are many. However, if a person is exposed to a high-intensity electromagnetic field for a long time (note that this is a constantly changing electromagnetic field, not a constant magnetic field), he may cause cancer.

NowThe frequency of the CPU and motherboard bus has entered the decimeter microwave band, and those who open the case cover for a long time should pay attention. In short, the magnet is very safe, don't be afraid, although the microwave oven cannot be avoided, but also pay attention to it, try not to open the lid of the box, try to open it, try to stay away, and don't open it to people.