The spelling of the word "hoban" can be explained using the International Phonetic Alphabet (IPA). The first sound is represented by the letter /h/ which is a voiceless glottal fricative. The second sound is represented by the letter /o/ which is an open-mid back rounded vowel. The third sound is represented by the letter /b/ which is a voiced bilabial stop. The last sound is represented by the letter /æn/ which is a nasal vowel sound followed by a voiced alveolar nasal consonant. Overall, the IPA transcription for the word "hoban" is /həʊbæn/.