A Notice of Availability of Hearing Assistance Devices is a document that informs the public that a venue has a device or system available to assist those with hearing impairments. The notice typically includes information about the type of device or system, as well as how to access it. There are several types of Hearing Assistance Devices available, including: 1. Hearing Loops: A hearing loop is a device that transmits sound directly to hearing aids or cochlear implants. It is also known as an induction loop or audio loop. 2. Assistive Listening Devices (ALD): These are devices that amplify sound and can be used with or without a hearing aid. These devices can also be used in public venues, such as theaters and auditoriums. 3. Infrared (IR) Systems: These systems use infrared technology to transmit sound, and are typically used in places such as movie theaters. 4. Audio Description: This is a service that provides a verbal description of what is occurring on the screen or stage. This can be provided on headsets or through a technology such as a broadcast. 5. Captioning: This is a service that provides written text of the audio information on a screen or device. This can be used in a variety of settings, such as theaters, museums, and even at home. The Notice of Availability of Hearing Assistance Devices informs the public of what type of device or system is available, and how to access it. This is an important document for those with hearing impairments, as it allows them to access these services.