Joke Collection Website - Public benefit messages - When the message rang, did we not notice this phenomenon when we heard the sound?

When the message rang, did we not notice this phenomenon when we heard the sound?

This is the electromagnetic interference caused by the transmission signal between the mobile phone and the base station. When you make a phone call or send a text message, you will first hear the sound of the stereo and then connect the phone. This is that the mobile phone is transmitting signals.

When you make a phone call or send a text message, you will still hear the beep first, and then receive the phone call or text message. At this time, the mobile phone is receiving the signal.