The proper spelling of the phrase "hear thing" is actually "hearing." This is because the word "hear" acts as a verb in English, indicating the act of perceiving sound with one's ears. The suffix "-ing" is then attached to create a present participle verb form, indicating an ongoing or continuous action. In IPA phonetic transcription, "hearing" is pronounced as /ˈhɪərɪŋ/, with the emphasis on the first syllable and the second syllable sounding like the word "ring."