Louise Hart is spelled using the International Phonetic Alphabet (IPA) as /luːiz hɑːrt/. The first syllable in "Louise" is pronounced with a long "oo" sound, while the "s" is pronounced like a "z" sound. The last name "Hart" features a long "a" sound in the first syllable, followed by a soft "r" sound. Proper spelling is essential for effective communication, and it's important to use phonetic transcriptions to accurately represent the sounds of spoken language.