a11yTips — Mix audio so foreground speech is louder than…

Mix audio so foreground speech is louder than background sounds

no. 134

Make sure foreground speech is always four times louder than background sounds

Whenever pages embed audio files, where the information being conveyed comes over some background audio (music, traffic noise, crowd murmur, yelling, etc.), end users – especially those with hearing impairments – are at a risk of having difficulty clearly discerning the information presented in the foreground. As the audio file is consumed as a single object within the page, separating the foreground audio from the background noise is usually impossible. In order to help users clearly understand the [...]

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