The integration of artificial intelligence (AI) into education has brought significant changes to traditional teaching methods, particularly in the field of language education. This study explores the impact of the "Voice Mode" feature in ChatGPT on English teaching in university programs. The "Voice Mode" allows students to interact with AI through voice, creating more natural and realistic conversations. This study aimed to evaluate the effectiveness of this technology in improving students' English communication skills compared to traditional teaching methods. A survey was conducted with 156 students from Viet - Hung Industrial University to assess the effectiveness of "Voice Mode" in enhancing English communication skills and student satisfaction. Before using "Voice Mode", only 32.1% of students had used teaching assistant technologies, and 64.1% lacked confidence in English communication activities. After using "Voice Mode", 80.2% of students participated in at least 4 class sessions, and 66.7% felt satisfied or very satisfied with the experience. The results showed a clear improvement in students' English communication ability, with 78.8% of the students experiencing moderate to significant improvement. This study highlights the potential of AI in language education and encourages the application of advanced technology to improve the quality of English teaching and learning.