system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: what makes our voices so different?
gpt
Our vocal cords are like the strings on an instrument. If the same note is played on a violin versus a guitar, the strings are vibrating at the same pitch or frequency. However, because of how the vibration radiates through the different shape and materials in the instrument, the note sounds different coming out of the violin versus the guitar.

While the pitch or frequency of our vocal cords may vibrate the same, our entire head cavity acts as the instrument to shape the sound of the note. This is why people's voices are different!