Perbedaan perubahan ambang perfrekuensi dan signal to noise ratio antara terapi metilprednisolon dengan terapi metilprednisolon dan oksigen hiperbarik pada tuli mendadak penelitian pendahuluan = Difference in frequency treshold and signal to noise ratio change between metil prednisolon and metil prednisolon wih hyperbaric oxygen therapy for sudden deafness patient pilot study