Loss or abnormality of function. Sounds or symbols are grouped together to form meaningful words. Symbols or words are grouped together to form meaningful phrases. Non-verbal communication includes facial expression, body language, natural gestures, tone of voice, drawing and use of symbols. This describes the fundamental frequency of voice.
Frequency is measured in hertz in the same way that temperature is measured in degrees centigrade.
Difficulty relating to the world and using language appropriate to a particular situation. May be developmental or acquired . May be developmental or acquired . Difficulty understanding and using the meanings of words. May be developmental or acquired .