Explanation

The noSoundHazard value is the opposite of sound — it is used to indicate that the the publisher has checked the publication for sound hazards and is sure that none exist.

The value is not an indication that a lack of sound is a hazard.

The noSoundHazard value must never be set together with the unknown, sound, or unknownSoundHazard values, as these values conflict.

The noSoundHazard value should not be set with the none value, as these values are redundant.

Examples

Example 1 — EPUB 3
<meta property="schema:accessibilityHazard">noSoundHazard</meta>
<meta property="schema:accessibilityHazard">noFlashingHazard</meta>
<meta property="schema:accessibilityHazard">unknownMotionSimluationHazard</meta>
Example 2 — EPUB 2
<meta name="schema:accessibilityHazard" content="noSoundHazard"/>
<meta name="schema:accessibilityHazard" content="noFlashingHazard"/>
<meta name="schema:accessibilityHazard" content="unknownMotionSimluationHazard"/>
Example 3 — Audiobooks
"accessibilityHazard": [
   "noSoundHazard",
   "noFlashingHazard",
   "unknownMotionSimluationHazard"
]

ONIX Mapping

The noSoundHazard value maps to ONIX list 143 code 16 ("No sound hazard warning necessary").

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