Get your headphones ready, today’s show is all about sound. We’ll visit a laboratory where the sounds of indoor spaces are designed. Then, we keep our ears open as we head outside. For today’s throwback we have two stories from our Audiophiles series. We profiled Bay Area residents who are deeply involved in the world of sound. The series was the brainchild of Martina Castro, whose voice you’ll be hearing later on in the show.