Hearing assistive technology (HAT) gives additional assistance beyond what the hearing aid or cochlear implant can do by itself. An example is a wireless microphone that sends the signal directly to your hearing aid or cochlear implant. Diglo (formerly Harris Communication) used to produce this guide on assistive technology. It explains different types of assistive listening devices (ALD) and shows corresponding examples. HAT could also be an app on your smartphone that allows you to receive captions from speech or phone conversations.

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