With a large number of kids using ear buds and headphones, noise-induced hearing loss is a serious issue, according to the American Speech-Language-Hearing Association. Just last year, the World Health Organization estimated 1.1 billion teenagers and young adults are at risk of hearing loss due to the unsafe use of personal audio devices, including smartphones, and exposure to damaging levels of sound at noisy entertainment venues such as nightclubs, bars, and sporting events.