Vocal Deliverys

Vocal delivery is the ability to project one’s voice, using different qualities to change or amplify the expression.
Definition and History: Vocal delivery includes components of speech delivery that relate to your voice. These include rate, volume, pitch, articulation, pronunciation, and fluency.( http://2012books.lardbucket.org/books/a-primer-on-communication-studies/s10-03-vocal-delivery.html ) 
In 1762, Thomas Sheridan said in A Course of Lectures on Elocution that “some of our greatest men have been trying to do that with the pen, which can only be performed by the tongue; to produce effects by the dead letter, which can never be produced but by the living voice, with its accompaniments”(p. xii). He called for an increased emphasis on different parts of vocal delivery. In 1999, TheoVan Leeuwen came up with a list of several vocal delivery qualities that carry different meanings:
1) tension-how tight or strained
2)   roughness—how raspy and throaty (with rougher tones being more associated with men)
3)   breathiness—how airy or intimate (the more airy, usually in Western cultures, the less authority the voice is deemed to have)
4)   loudness—how booming or soft
5)   pitch—how high or low (related to gender)
6)   vibrato—how trembling it sounds (with more vibrato equated with being emotional)
When people speak, we not only listen to the words that are used, but how their voice portrays the message they are trying to send. There is a lot of meaning behind how someone shapes what they are trying to say, not solely the context. 
Examples:
There are many diverse ways to change one’s voice. When I think of vocal delivery, I tend to think about poetry and theater. In poetry, people might go for a more dark aspect, and use monotone voice and drastic pauses. For theater, actors and actresses need to emphasize every word they use, projecting their voice and dramatically changing the looks on their faces so that the entire audience will understand what is going on.
Morgan Freeman: http://youtu.be/KtwXlIwozog?t=50s
JFK: https://www.youtube.com/watch?v=6DbhTwahqPg
James Earl Jones: https://www.youtube.com/watch?v=qwB7fRI-jp8
Robin Williams: https://www.youtube.com/watch?v=qr2bKXBV67o
Specific vocal delivery can even remind us of someone else's voice https://www.youtube.com/watch?v=tC8oTvmTFcg
Key Words: 
Sonic Persuasion 
Sonic Rhetoric 
Aurality 
Further reading: Sound matters: Notes Toward the Analysis and Design of Sound in Multimodal Webtexts by Heidi McKee https://wamfall14.files.wordpress.com/2014/09/mckeecc06.pdf 
Citations:
http://2012books.lardbucket.org/books/a-primer-on-communication-studies/s10-03-vocal-delivery.html
https://wamfall14.files.wordpress.com/2014/09/mckeecc06.pdf