When you sing ,  sounds with the voice and augments regular speech by the use of sustained tonality, rhythm, and a variety of vocal techniques.
Yes the vocal cords are a fascinating thing.  It takes a lot of understanding and technique to be able to control your voice well enough to sing.
A voice type is a particular human singing voice identified as having certain qualities or characteristics of vocal range, vocal weight, tessitura, vocal timbre, and vocal transition point
I'm not sure what vocal type I would fall into.  I have a high pitched voice for my age and I can reach higher notes than some but I wouldn't call myself a professional or anything.
Voice classification in non-classical music
There is no authoritative system of voice classification in non-classical music as classical terms are used to describe not merely various vocal ranges, but specific vocal timbres unique to each range. These timbres are produced by classical training techniques with which most popular singers are not intimately familiar, and which even those that are do not universally employ.
Overview.
The term non-classical music is typically used to describe music in jazz, pop, blues, soul, country, folk
Singing
Singing is the act of producing musical sounds with the voice and augments regular speech by the use of sustained tonality, rhythm, and a variety of vocal techniques. A person who sings is called a singer or vocalist (in jazz and popular music). Singers perform music (arias, recitatives, songs, etc.) that can be sung with or without accompaniment by musical instruments. Singing is often done in an ensemble of musicians, such as a choir of singers or a band of instrumentalists. Singers may