Qualities of warmth
Focus with diligence on the issues of need.
Generally, the emotions of happiness, joy and confidence create higher vibrational rate of the vocal chords and produce words that are more memorable long term (Smith, Jones, Feinberg & Allan, 2012) and (Scherer, 1986). In women, this is a higher pitch and in men it is a lower pitch.
A friendly smile, or an animated face.
A strong, warm or especially expressive voice.
Strong, fluent hand gestures.
Powerful eye contact.
A keen sense of humor.
The ability to put your audience at ease.
Storytelling and use of studies.
Direction towards an aim.
The ability to explain concepts clearly.
The desire to help your audience understand.
Smith, D., Jones, B., Feinberg, D. R., & Allan, K. (2012). A modulatory effect of male voice pitch on long-term memory in women: Evidence of adaptation for mate choice? Memory and Cognition, 40(1), 135-44. doi:10.3758/s13421-011-0136-6.
Scherer, K. (1986). Vocal affect expression: A review and a model for future research. Psychological Bulletin. 99(2). Retrieved from https://www.ncbi.nlm.nih.gov/pubmed/3515381