The posterior auricular nerve supplies the posterior auricular muscle, and the intrinsic muscles of the auricle.
ðə pɑːstˈɪɹiɚɹ ɔːɹˈɪkjʊlɚ nˈɜːv səplˈaɪz ðə pɑːstˈɪɹiɚɹ ɔːɹˈɪkjʊlɚ mˈʌsəl, ænd ðɪ ɪntɹˈɪnsɪk mˈʌsəlz ʌvðɪ ˈɔːɹɪkəl.