Clara Maria Livia Suitela; Aripin; Erika Dina Permata; Muzalfa Nakiatun Niza; Naeli Laelal Khiaroh. Phoneme Classification Optimization Using Backpropagation Neural Network and Principal Component Analysis. Jurnal Nasional Teknik Elektro dan Teknologi Informasi 2023, 12, 37-43.