Lip-reading can convey about 26% of speech.

Lip-reading can convey about 26% of speech.

• A. True
• B. False
• C. Lip-reading conveys 100% of speech
• D. Lip-reading requires no interpreters

Answer: (A)

Lip-reading provides only a limited view of spoken language because many sounds rely on cues from voice quality, intonation, and context that aren’t visible on the lips, and several phonemes look alike when spoken. The 26% figure is a commonly cited estimate of how much speech can be understood from visual lip movements alone under typical conditions. It’s not exact and can vary with the speaker, lighting, and the viewer’s skill, but the overall idea holds: a little over a quarter of speech is typically recoverable visually, while much of the message depends on context, meaning, and audible cues that lip-reading can’t convey. Given that, the statement is true. Also, lip-reading doesn’t replace interpreters or other accessibility supports in important settings, since it doesn’t capture all speech information.

Lip-reading provides only a limited view of spoken language because many sounds rely on cues from voice quality, intonation, and context that aren’t visible on the lips, and several phonemes look alike when spoken. The 26% figure is a commonly cited estimate of how much speech can be understood from visual lip movements alone under typical conditions. It’s not exact and can vary with the speaker, lighting, and the viewer’s skill, but the overall idea holds: a little over a quarter of speech is typically recoverable visually, while much of the message depends on context, meaning, and audible cues that lip-reading can’t convey. Given that, the statement is true. Also, lip-reading doesn’t replace interpreters or other accessibility supports in important settings, since it doesn’t capture all speech information.