Auditory hyper-reactivity affects up to 66% of children with autism spectrum disorder (ASD) and has been linked to greater stress and anxiety for children and their families. Exposure and Response Prevention (E/RP) is highly effective for reducing obsessive/compulsive behaviors in children with both OCD and ASD. This study is the first to assess the feasibility and efficacy of E/RP for auditory sensory hyper-reactivity in ASD.