Stromer is typically spelled with the German letter "ö," which represents a sound that is between the English "o" in "go" and "u" in "blur." In IPA transcription, this sound is represented with the symbol [œ]. The "r" at the end of Stromer is pronounced with a rolling or trill sound, which is represented in IPA with the symbol [r]. Therefore, the correct IPA transcription of Stromer would be [ˈʃtʁœmɐ]. It is important to use the correct spelling and pronunciation of Stromer to accurately communicate in German-speaking contexts.