Voice and Language in Speaking and Writing

Voice and the language used can have a significant change depending on who the audience is. When I'm around people whom I know very well such as my friends and family, my voice and language isn't formal and I pretty much use any type of language. There are times, though, when a professional type of language is needed, especially around friends, because you also don't want to seem like an ignorant or unsophisticated person. When I am speaking with a teacher, a stranger, or any other person, however, my voice and language tend to be more formal and respectful. I watch what I say and I try to use a tone that is appropriate during the conversation. Voice and language can also change in writing because with friends and family, it is not as necessary to write formally as opposed to writing to other people because a more formal and grammatically correct style is needed.