An induction loop is an assistive listening system that transmits sound to hearing aids and other compatible receivers through magnetic fields. It is commonly used in public places such as theaters, schools, and churches to enhance the listening experience of those with hearing difficulties. Some synonyms for induction loop include hearing loop, audio induction loop, and hearing assistance system. Other related terms include telecoil, which is a component within hearing aids that allows them to pick up the magnetic signal, and assistive listening device (ALD), which refers to any technology designed to improve the communication of individuals with hearing impairments.