AccessiWeb 2.2 - Rule 4.19.1

Summary

This test consists in checking whether pre-recorded audio-only time-based media is enough audible.

Business description

Criterion : 4.19

Test : 4.19.1

Test description :

Does each audio time-based media that is prerecorded and played via an Object, Applet, Embed tag or that is provided for download pass one of the conditions below (except in special cases)?

  • The background sounds can be turned off
  • The dialogue track(s) are 20 decibels higher than the background sounds.
  • An alternative version in which the backgroun sounds can be turned off is available
  • An alternative version in which the dialogue track(s) are 20 decibels higher than the background sounds is available.

Level : Gold

Technical description

Scope : page

Decision level : semidecidable

Algorithm

Selection

Selection1 : All the embed, applet and object tags (embed, applet, object)

Process

The selection handles the process.

For each occurence of the Selection1 raise a MessageA

MessageA : Check Manually the elements
  • code :ManualCheckOnElements
  • status: NMI
  • parameter : snippet
  • present in source : yes

Analysis

Not Applicable

Selection is empty (The page has neither object, nor applet nor embed tag)

Pre-qualified

The selection is not empty

Notes

We detect the elements of the scope of the test to determine whether the test is applicable.

On latest webdev data set (2013-10-30, 78,000 pages), the test scope (embed, applet, object) has been found on 6795 pages, i.e on 8.7% of the pages