From Farinelli, the eighteenth century castrato who brought down opera houses with his high C, to the recording of "Johnny B. Goode" affixed to the Voyager spacecraft, Let Me Clear My Throat dissects the whys and hows of popular voices, making them hum with significance and emotion. There are murders of punk rock crows, impressionists, and rebel yells; Howard Dean's "BYAH " and Marlon Brando's "Stella " and a stock film yawp that has made cameos...