"In soundproof booths that look like huge refrigerators with windows, amazingly patient volunteers sit for two hours at a stretch and read aloud. They read Shakespeare, algebra problems, Renaissance poetry and engineering textbooks. Although they read to no one but a microphone, they are well aware of who is listening: more than 250,000 blind and learning disabled students across the country who wouldn't be able to succeed in school without these precious recordings."
http://www.mercurynews.com/patty-fisher/ci_14923114?source=email&nclick_check=1