Assistive listening devices (ALDs) are devices designed to help individuals with hearing loss improve their ability to hear and understand sounds. These devices work by amplifying sound or reducing background noise, making it easier for people with hearing loss to communicate in various environments. ALDs can be used in conjunction with hearing aids or as standalone devices. Examples of ALDs include personal amplifiers, FM systems, loop systems, and infrared systems. These devices can be beneficial in situations such as classrooms, theaters, conferences, and one-on-one conversations, providing enhanced clarity and accessibility for individuals with hearing loss.