Here the person with low hearing has a good view of the person he/she is communicating with, because the light source doesn’t block the visibility of the other person’s face. He/she also has a good view of the entrance and can see when other people enter the room.

People with low hearing often use facial expressions and lip reading to communicate with other people. Therefore it is very important to them to have a good view of the other person. When the other person is sitting with a light source behind him/her, it is difficult to see him/her face because of the shadow. They also prefer to have a good view of the entrance, so they can see other people coming into the room.