Onomatopoeia is the process of creating a word that mimics phonetically, suggests, or resembles a sound that it is supposed to be reproducing in the form of letters for the reader.
An Onomatopeia is a figure of speech. Basically, figures of speech are the resources of a language to make the messages we send more expressive and meaningful. Such resources can amplify the meaning of a sentence, as well as fill gaps in a sentence with new meanings.