「シュルルル」,Onomatopoeia, なるとまんが
カタカナ is often used for emulating sounds and noises. As indicated in our なかま textbook and various online sources, this is one of the easier-to-spot uses of カタカナ. In this sense, カタカナ can be interpreted as conveying no inherent meaning in the characters, similar to its use serving as a loanword alphabet, in which the word itself contains no meaning, instead referring to a borrowed concept. Contrast this with ひらがな or かんじ, in which characters or sets of characters carry meaning.
「スズキ」、「ニュ-スリリース」, Business words, Suzuki Motors website
In orders of official business, カタカナ is often used. This is likely due to the historical/traditional relationship between カタカナ and patriarchal society. That is, areas of life more commonly associated with males is likewise linked to カタカナ. The visual appearance of カタカナ itself may also suggest a more serious, more reliable nature, contrasting with the more curvy, free form of ひらがな.