The correct spelling of "erdman" follows the IPA phonetic transcription, with emphasis on the first syllable "erd". The word is pronounced as /ˈɜːrdmən/ with the stress placed on the "er" sound. The "d" sound represents the voiced dental plosive in the word while the "m" represents the voiced bilabial nasal sound. By following the IPA transcription, individuals can easily understand the sound and spelling of the word "erdman."