He is used to back up a tone as well as the kiriyaakan convey the ideas, knowledge, feeling and needs to recognize and respond to (yama and thin small earthen cistern sawanit onwat Siri, 2535:1)
To speak is to use words, tone and behavior convey ideas, knowledge, feelings and needs. The audience perception and response (Swnit a coming disaster and Tira Non Anawat Mr. Wong, 2535: 1).
Speech is the use of words and actions back tone convey the ideas, knowledge, feeling and needs to audience perception and response. (bag yamabhai and universities non piyabutr wanichpongpan, development 2535: 1).