Mute
zaa
The principle of the microphone，Paper Cup Sound#miwu###viral#scienceexperiments#DIY#scienceismagic
Follow
1
0
0
kwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwaikwai kwaikwaikwaikwaikwaikwaikwaikwaikwaikwai