It's easy to imagine that a deep silence hangs over people with autism, but nothing could be further from the truth, at least in the author's case. His son Cameron has always been a noisy, histrionic person. He speaks most volubly with his body, and over the years the author and his wife Leslie have learned to interpret his gleeful scissors-kicking jumps, his contented or angry rocking, his myriad of wordless shouts, the fine gradations in a face that to the uninitiated seems blank, his lexicon of claps. In this article, the author shares his story of learning how to communicate with his son, who has autism.