It is narrated that the Prophet ﷺ said:

"Allah does not listen to a prophet as He listens to a prophet who recites the Qur'an in a loud and pleasant tone." (Sufyan said: "This means a prophet who feels satisfied by the Qur'an so he doesn't need many worldly pleasures.")

This Hadith links the beauty of your voice to the satisfaction in your heart. Reciting clearly and with feeling shows that the Quran is your main source of comfort, making worldly distractions feel less important.