The spelling of the word "Hanss" can be explained using the International Phonetic Alphabet (IPA). The IPA phonetic transcription for "Hanss" is /hæns/. The first sound is "h" which is pronounced as voiceless glottal fricative. The second sound is "æ" which is pronounced as near-open fron unrounded vowel. The third sound is "n" which is pronounced as alveolar nasal consonant. The fourth sound is "s" which is pronounced as voiceless alveolar fricative. Therefore, the correct spelling for "Hanss" is with double "s" at the end.