Loud sounds should startle young children. If not, they might have hearing loss. Learn about hearing loss, hearing tests and hearing aids from a professional audiologist in this free health video. Expert: MJ DeSousa Contact: www. listenupcanada. com Bio: MJ DeSousa is Chief Audiologist and one of the founders of ListenUP! and is responsible for staffing and clinical practices, including all Audiology. Filmmaker: Kevin Fletcher