Fredrik Amadeus Wulff (born February 11, 1845 in Gothenburg, died December 31, 1930 in Lund) was a Swedish phoneticians and philologist.
Chart of Wulff's phonetic transcription system from 1888. Many of the symbols would end up being used by the International phonetic alphabet (IPA), but others, such as Greek τ δ ν for dental [t̪ d̪ n̪] and π μ for [p̪ m̪], would not be. Script and rotated letters would be used by the IPA, but not bold or italic typeface. This system includes a level of phonetic detail in its letters that the IPA transcribes with diacritics.