Quick answer
Hearing impairment is any reduction in a person's ability to detect or process sound, ranging from mild difficulty following speech in noisy rooms to profound deafness with no usable hearing. Digital products create barriers wherever they route information through sound alone — audio-only alerts, uncaptioned video, phone-only support — so accessible design builds a visual or text equivalent for each of those channels.
What is hearing impairment?
Hearing impairment refers to a reduced ability to detect or process sound. It can range from mild hearing loss to profound deafness and may be present from birth or develop later due to factors such as illness, injury, noise exposure, or aging.
People with hearing impairment may experience accessibility barriers when digital products rely only on audio to communicate information.
How does hearing impairment affect digital accessibility?
Digital experiences can become inaccessible when important information is delivered only through sound. Common examples include videos without captions, audio-only notifications, and support channels that rely only on phone communication.
Accessible digital products provide alternative ways to access information through text, visuals, and other communication methods.
What accessibility features support users with hearing impairment?
Common accessibility solutions include:
Captions
Synchronized text for video content, including spoken dialogue and relevant sounds.
Transcripts
Text alternatives for audio and video content.
Real-time captioning
Live captions for webinars, meetings, and video calls.
Text-based communication
Chat, email, and accessible support channels.
Visual and haptic alerts
Visual indicators or vibrations for sound-based notifications.
What WCAG guidelines address hearing accessibility?
WCAG includes several success criteria related to hearing accessibility, including:
| 1.2.1 | Audio-only and Video-only (Prerecorded) |
|---|---|
| 1.2.2 | Captions (Prerecorded) |
| 1.2.4 | Captions (Live) |
| 1.2.5 | Audio Description (Prerecorded) |
| 1.4.2 | Audio Control |
These criteria help ensure that audio and video content is accessible through alternative formats and controls.
