Consider the emotion you want to express through vocalization; it adds depth to communication. His vocalization of joy was contagious.
Pro Tip 2/3
Beyond Words
Vocalization includes sounds beyond words; think of hums, sighs, and laughs as part of it. The baby's cooing was a soothing vocalization.
Pro Tip 3/3
Cultural Variations
Be aware of cultural differences in vocalizations, as the same sound may convey different meanings. In some cultures, hissing is an acceptable vocalization of disapproval.