Test the purifier noise laboratory Do you know how to do it?
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The ring instrument instrument Xiao Bian to explain to everyone to explain the test of the noise test of the purifier, first to give you a simple analogy, our fans, is not there is a 1st, 2nd, 3rd, 4th gear, is not a small file When the sound is relatively small, the sound is louder at large, but it is not cool enough to turn it down. The principle of the purifier is similar to that of the fan, where the air is sucked in and the clean air is blown out on the other side. When the large gear, the wind power is large, and the noise is also great. If the purifier can achieve a small noise and high power, it is a purifier. What happened to the manufacturer.
Here the ring instrument needs to explain the noise room, place the purifier in the noise room, open to the maximum gear. Look at how much noise the DB is in.
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