Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Audio CAPTCHA(also: Audio HIP, Audio Human Interaction Proof)
- An auditory alternative to visual CAPTCHAs, typically presenting distorted spoken letters, numbers, or words that users must transcribe. While intended as an accessible alternative for blind users, research shows audio CAPTCHAs have success rates of only 43-50% for screen reader…
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