Tencentech interview questions

I applied online and got an interview invite. I answered a short application form and went on the initial interview. Interviewer is friendly, questions are simple and easy to answer. However, the office walls are thin, so you can literally hear people talking from the reception area. I was invited for final interview the next day. The interviewer maintained a low voice that is diffucult to hear. I assume that he did this so that other applicants won't hear the interview questions.