Why does the phone whistle when it is close to the Xiaomi Smart Camera C300?
Because the microphone of the Xiaomi Smart Camera C300 collects the sound output by the mobile phone in the same environment, and it is amplified by the circuit to produce howling, which is a normal phenomenon. It is normal if you turn on the monitoring screen of the Xiaomi Smart Camera C300 and turn on the sound of the phone screen at the same time, the distance between the two should be greater than 1 meter to avoid howling.
Does it help?
Yes
No