He goes out and comes back with 43 albums and listens through them all, jotting down notes".
Their cries are overheard by a third character, a black woman called the conservator, who approvingly listens through the wall as she cleans the museum's picture frames.
The subject of refugees is in the air, and in Last Dream (on Earth) (Assembly Hall, part of the Made in Scotland showcase), the audience listens through headphones.
One good method is to have a computer ask the questions, while the interviewee listens through earphones and enters the answers on the screen — without the intervention, or even the presence, of another human.
Disturbingly, he creeps in disguise to the front door of his own house in London after his assumed death, and listens through the letter box to a fragment of his own obituary film on TV.
But in "Grizzly Man" the viewer sees only the back of Herzog's head as he listens through headphones; facing Herzog, and the camera, is Treadwell's former girlfriend, Jewel Palovak.
