A hearing aid is a small, portable device that is worn in or around the ear to help people with hearing loss. Hearing aids work by amplifying sound and making it easier for the wearer to hear and understand speech. They come in a variety of styles, including in-the-ear, behind-the-ear, and in-the-canal, and are available in different colors and sizes to match the user's skin tone and preferences. Hearing aids can be customized to individual hearing needs and preferences, and can be adjusted by a hearing care professional. Advances in technology have led to hearing aids with features such as noise reduction, feedback elimination, and wireless connectivity with other devices such as phones and music players.