An electronic device that helps to aid a person with hearing impairment. They can be used with hearing aids, cochlear implants, or independently. Assistive listening devices (ALDs) can be something simple like an amplified telephone, to a more advanced system such as a wireless FM system.
They are used to help enhance speech understanding for those with hearing loss, specifically useful in difficult listening environments such as background noise. Assistive listening devices may be owned by the user or may be available to use in some public venues such as theatres, places of worship, or public transportation.