From the time Westinghouse started commercial broadcasting in 1920 through the end of the radio soap operas in the early 1960s, hundreds of men and women performed on radio. Day after day, week after week, these performers (e.g., Jack Benny, Bing Crosby, Kate Smith, Lowell Thomas, Kay Kyser, and Bob Hope) became familiar voices and welcomed guests in the homes of millions of Americans. Actors, comedians, singers, commentators, announcers,...