WPPB 88.3 has added three new programs to its schedule. “TED Radio Hour,” based on talks given on the TED stage and hosted by Guy Raz, will be broadcast every Sunday from noon to 1 p.m. Each show is centered on a common theme — the source of happiness, crowd-sourcing innovation, power shifts, inexplicable connections — and injects soundscapes and conversations that bring these ideas to life.