People might get annoyed if you practice singing too loud.
John is listening to some tunes on the radio while eating dinner with his family.
John wants to be a better singer on karaoke night.
John hums along with a song he likes on the radio.
John starts singing along to a song on the radio as loudly as he can.
John memorizes the melody of the song, so he can sing it better.
John is admonished for his rude behavior by his family.