Here is the definition of semantic noise:
Of the various forms of noise, semantic noise may be the most common and difficult to define. It can best be described as particular diction or syntax that leads to confusion or misinterpretation of the intended message. One reason semantic noise is so widespread is how easily it can extend to written language. For example, the reader may perceive this article to be correct if it is written well enough, though that has little to do with the content. However, a person using language this formal in casual conversation may seem a bit strange. Semantic noise often takes the form of disrespectful or outdated terminology that offends a particular group or demographic. It also occurs with words or phrases that mean different things to different people. Indeed, semantic noise occurs to some extent or another in almost all forms of verbal communication
