I have a simple answer for this question. You are that listener. You are a listener because listening is a compulsory day to day activity of the programme. Although, most of the time you will be reading; there will be occasions when you have to listen to a tape recorder, radio, television or video in this programme. You are likely going to attend lectures and meetings in the study center. You need the skill of listening accurately and to comprehend what is conveyed to you as information. That is why you need to go through this unit, carefully.
As a listener, I cannot determine where you are now, studying this unit; it maybe in your home, your work place, an isolated place or even inside a vehicle taking you to a destination. Wherever you may be, there is something important about listening. We listen daily, moment by moment.