Why do people around you sometimes sing when thinking about the melody of a song?

Because I have experienced it, I specially read many answers to similar situations on the Internet, which are summarized as follows:

1, illusion, hum, others heard the retelling;

2, brain waves, telepathy transmits information, other people's heads receive signals and respond to stress;

3. Atmosphere contrast, the same environmental atmosphere leads both parties to think of a certain paragraph of the song at the same time;

4, tacit understanding, familiar with the two sides have similar living environment, listening to music atmosphere, such as twins, brothers and sisters, family, husband and wife, friends and so on. ;

5, the priming effect, the parties imagine a melody, expressed implicitly with expressions, body movements, etc. And another person remembered the relevant information when the party sang this song, so when he saw this performance, he inadvertently associated with this song and sang under pressure;

6. Coincidence, there is nothing to explain ~

But according to my own personal experience, more than five times, and then more than three people, most of whom are just colleagues. The most outrageous time was when I was thinking about a melody of that song, and the buddy who suddenly sang was more than 0 meters away from me 10!

So, to sum up, personally, the most realistic explanation is the second one, which is scientific and not fantastic. Brain waves should exist in all living things, but their transmission mode is limited by media. Nerve currents control body movements and speech. When thinking about a song (when thinking actively), the power of electric waves increases, spreads in the air, is captured by the brains of people nearby, and then stimulates the memory related to the recipient's brain, so it is sung (of course, the recipient can't sing this song, and without the information of this song, the brain will not respond to singing this song).

what do you think? Those who agree click like.