"From the living room today, you could hear dialogue from a film on television:'if I were you, Jim, I wouldn't do that'.After that line, the howling of a dog, slow and sure, rising in a perfect arc and trailing off in great sadness. Then I thought I heard an airplane, but there was silence and I was glad. The park is full of silence made up of sounds. If you press your ear to a tree and listen, after a…