The correct spelling of the phrase "study at crowd" is actually "study in a crowd." The IPA phonetic transcription of this phrase would be /ˈstʌdi ɪn ə kraʊd/. The word "in" is used to indicate being among a group of people or objects, while "at" is used to indicate a specific location. It is important to use the correct preposition in order to convey the intended meaning of the phrase.