Sound Sources are the person or thing that create the sound you are looking for responses to.. Environmental Sound Sources include air conditioners, fans, computers, shoes, bells, paper, toys, spoons, chair scoot, coughs, sneezes, clapping, stomping, dropped objects, knock at door, doorbell, dog barking, cat meow, door slamming, car horns, buses, and many more.

Speech Sound Sources include speech by the mother, female teacher, male teacher, father, young girl or young boy, familiar female, unfamiliar female, familiar male, unfamiliar male, recorded voices.