1.4 Distinguishable · Perceivable
WCAG 1.4.7 Low or No Background Audio
Level AAA
For pre-recorded speech that isn't a vocal performance, background sound should be ≥ 20 dB lower than the foreground speech.
Common failures
- Tutorials use loud music beds that drown out the narrator.
How to fix
- Mix background audio at least 20 dB below foreground speech, or remove it.
Related criteria
- WCAG 1.4.2 Audio Control Level A