Many people mistakenly think that singing ability is primarily related to built-in "talent." But actually, anyone can improve their voice by understanding and applying a few basic concepts. Your voice is an acoustic mechanism for creating sound, and just like any other instrument, it contains a few basic components. But the human vocal mechanism has a little something extra...
1. The Initiator
From our examples, the initiator on a guitar would be a finger or pick that plucks or strums the string. On a trumpet, just like in your voice, the initiator is your breath. The initiator is the driving force behind any instrument.
2. The Vibrator
A guitar's vibrator is the string. When a guitar string is plucked, it's easy to see it vibrating. It's harder to see how your vocal vibrations start, but basically two little muscles in your throat (called the vocalis or thyroarytenoid muscles) come together and vibrate, similar to the way you buzz your lips to play a trumpet.
3. The Resonator
Guitars (at least acoustic guitars) have a wooden body with a hole beneath the vibrating strings that acts as a resonating chamber. Trumpets have a series of tubes controlled by valves that allow for a longer or shorter resonating space that ends in a bell to project the sound forward. Your voice has resonators above the vocalis muscles, including your larynx, pharynx, oral cavity (mouth), and to a lesser extent, the nasal cavity. When you open up your voice into a vowel sound and extend it, your resonators shape your vocal sound into a musical tone.
4. The Articulator
Just knowing these facts won't make you a better singer, but it may help you to understand a little bit more about what happens when you sing. Your voice is an instrument. In fact, it is the original instrument. All other instruments are just imitations of the instrument that God made - your amazing voice!