cari istilah yang lo mau, kaya' ratchet:
 
1.
A person's normal speaking voice, without any change in volume, stress, "tone" or emphasis placed upon any of the words.

Antonym of "upper case voice".
"If you want to continue this discussion, I need you to stop yelling and speak calmly. Use your lower case voice."
dari markfromhouston Jum'at, 25 September 2009