Get a good sound, you may need to know: music quality.
The tone is determined by the material properties, structure, vocalization, and the number of overtones of the phonogram.
The singer’s voice is quite unique and has a strong discriminating degree. This is because the music quality is different.
The imitation show is to imitate the singer’s vibration, pitch, and overtone, and sing a very similar music quality.
Some artists can even imitate the musical instrument, for example, beatbox.
Different instruments can emit sounds that cover the same frequency, but we can still recognize different instruments. This is because different instruments have different music quality.
But the earphones and the sound can be very good to imitate the various sounds of the world because they receive the accurate signal and restore the waveforms of various music quality to form a playback.