Attachment: The reason for the large radiation on the back of the desktop is that there are protective measures set by manufacturers such as metal baffles on the front, but not on the back; Notebooks are different. The biggest radiation of notebook computer is above the keyboard. So after closing the lid, the radiation is relatively small.
Here's a complete one for you:
The implementation of the five-point system, whoever is rated as five points, is seriously exceeding the standard, but you should pay attention; Samsung and above also belong to the over-standard range, which should also attract your attention; One star is safe and can be used with confidence.
There are two levels of electromagnetic radiation, among which the unit of power frequency band is μt, and the radiation above 0.4μt belongs to strong radiation, which is harmful to human body and prone to leukemia after long-term contact. If the radiation is below 0.4μt, it is relatively safe. The unit of radio frequency electromagnetic wave is μw/㎝2.
Radiation index of crt display: ★★★☆☆
Now liquid crystal display is replacing the traditional display, and we have also tested it. The front of the display screen is 0. 1 1μt, the instant of startup is 0. 12μt, the time of shutdown is 0.1/μ t, and the side of the display screen is 0.12μ t. It seems that LCD is really reassuring.
Radiation index of LCD: ★ ☆ ☆ ☆.
Let's look at the mainframe of the desktop computer again. The front is 0. 17μt, but the central radiation of the console panel is slightly stronger, with distances of 0.03m and 0.26 μ t; The side of the main engine is 0.29μt, and the center of the left side of the chassis is 0.03 m and 0.23μt apart. The back is 0.46μt, but we are usually at a certain distance from the back of the mainframe, so the impact is not great. Also, the startup moment and standby state are both 0.17 μ t, and one more thing to say is that if the power connection of the desktop computer is reconnected, the radiation is 0.47μt, so keep a distance when using the desktop computer again.
Radiation index of desktop computer host: ★★★☆☆
But the next test is not very optimistic, subwoofer speaker, the center of the operation panel, the distance is 0.03 meters, 0.63 μ t; The center of the right side of the speaker is 0.03m and 5.68μ t away; Radiation is not small, so what is its safe distance? After careful testing, it is found that when the distance is 0.4 meters, its radiation is reduced to 0. 17μt ... So the subwoofer speaker has serious radiation, and it should be kept at least half a meter away when using it.
Radiation index of subwoofer speaker: ★★★★★☆.
Finally, I want to talk about the notebook computer, which is 0. 1. 13μt in front of the display screen, 0.3 m in front of the display screen, 0. 13μt on the side of the display screen, 0. 19μt on the keyboard and 0.22μt on the power adapter. The test results show that the radiation of notebook keyboard is slightly stronger and the power adapter is the largest.
Notebook radiation index: ★ ☆ ☆ ☆.
Tip: the radiation of LCD screen is very small, and the crt monitor is slightly larger, but they are all within the safe range; The radiation on the back and side of the host is large, so it is strongly recommended that you do not open the chassis for the convenience of heat dissipation. The subwoofer has serious radiation, so keep a distance of at least half a meter when using it. The radiation of the notebook is concentrated above the keyboard, so keep a distance from the power adapter when using the notebook.
Oh, yes, it is said that this computer and notebook don't radiate much, but the photoelectric mouse turns red and blue, which is very scary. Is there radiation? Are the radiation of wireless mouse and keyboard less than that of ordinary ones? And that WLAN transmitter! There are digital devices, digital cameras, mp3 and mp4.
To tell you the truth, this battery-powered DC appliance is the safest.
Ordinary mouse ordinary keyboard wireless mouse wireless keyboard wireless gateway printer digital camera mp4 power adapter
Ordinary mice 0. 1μt
Ordinary keyboard 0. 1 1μt
0.53μt higher than wireless mouse.
0.96μt above the wireless keyboard.
0. 15μt above the wireless gateway
And the printer 0.11μ t.
Digital camera power adapter 0. 1 1μt
Mp4 power adapter 0. 16μt
Radiation index of power adapter for ordinary mouse, keyboard, wireless gateway, printer, digital camera and mp4: ★☆☆☆☆;
Radiation index of wireless mouse and keyboard: ★★★☆☆
Tip: Ordinary keyboard and mouse, as well as wireless gateway, printer, digital camera and mp4 power supply have little radiation, so you can use them safely. However, wireless keyboards and wireless mice radiate a lot.