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Reword F23 #1826

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Jan 12, 2024
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Reword F23 #1826

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db06635
Reword F23
patrickhlauke May 21, 2021
cd09ec7
Update techniques/failures/F23.html
mbgower Dec 8, 2023
fbe92c1
Update techniques/failures/F23.html
mbgower Dec 8, 2023
f6b7b94
Update techniques/failures/F23.html
mbgower Dec 8, 2023
0eb793a
Tweak markup formatting
patrickhlauke Dec 8, 2023
05a1b66
Update techniques/failures/F23.html
mbgower Dec 13, 2023
a6bf23d
Update techniques/failures/F23.html
mbgower Dec 13, 2023
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76 changes: 48 additions & 28 deletions techniques/failures/F23.html
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<!DOCTYPE html><html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><head><title>Failure of 1.4.2 due to playing a sound longer than 3 seconds where
there is no mechanism to turn it off</title><link rel="stylesheet" type="text/css" href="../../css/sources.css" class="remove"></link></head><body><h1>Failure of 1.4.2 due to playing a sound longer than 3 seconds where
there is no mechanism to turn it off</h1><section class="meta"><p class="id">ID: F23</p><p class="technology">Technology: failures</p><p class="type">Type: Failure</p></section><section id="applicability"><h2>When to Use</h2>
<!DOCTYPE html>
<html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Failure of 1.4.2 due to playing a sound longer than 3 seconds where there is no mechanism to turn it off</title>
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<link rel="stylesheet" type="text/css" href="../../css/sources.css" class="remove"></link>
</head>
<body>
<h1>Failure of 1.4.2 due to playing a sound longer than 3 seconds where there is no mechanism to turn it off</h1>
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<section class="meta">
<p class="id">ID: F23</p><p class="technology">Technology: failures</p><p class="type">Type: Failure</p>
</section>
<section id="applicability">
<h2>When to Use</h2>
<p> Applies to all technologies except those for voice interaction. </p>
</section><section id="description"><h2>Description</h2>
<p> This describes a failure condition for Success Criteria involving sound. If sound does not
turn off automatically within 3 seconds and there is no way to turn the
sound off then Success Criterion 1.4.2 would not be met. Sounds that play over 3 seconds
when there is no mechanism to turn off the sound included in the content
would fall within this failure condition. </p>
</section><section id="examples"><h2>Examples</h2>
</section>
<section id="description">
<h2>Description</h2>
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I think it's important to mention that most browsers use heuristics to mute automatically playing audio / video now. That's probably not sufficient as a mechanism, at least that's what ACT concluded when we looked at it. Similarly, several browser support muting individual tabs, we didn't think that qualifies as a mechanism either. I think its important to make that clear.

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I completely agree.
In addition, some platforms offer the possibility to mute specific browser windows. I would neither consider this a valid mechanism.
In the initial issue description, the phrase "turn off the sound independently from any other audio output." was used. I think this is much closer to what we want to achieve.

<p>This describes a failure condition for Success Criteria involving sound. If sound does not
turn off automatically within 3 seconds and there is no way to turn the
sound off, independently from the overall system volume level, then Success Criterion 1.4.2 would not be met.
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Suggested change
sound off, independently from the overall system volume level, then Success Criterion 1.4.2 would not be met.
sound off, or control the volume independently from the overall system volume level, then Success Criterion 1.4.2 would not be met.

The sound would fall within this failure condition. </p>
</section>
<section id="examples">
<h2>Examples</h2>
<section class="example">

<ul>
<li> A site that plays continuous background music </li>
</ul>

<ul>
<li>A site that plays continuous background music </li>
</ul>
</section>
<section class="example">

<ul>
<li> A site with a narrator that lasts more than 3 seconds before
stopping, and there is no mechanism to stop it. </li>
</ul>

<ul>
<li>A site with a narrator that lasts more than 3 seconds before
stopping, and there is no mechanism to stop it. </li>
</ul>
</section>
</section><section id="tests"><h2>Tests</h2>
</section
><section id="tests">
<h2>Tests</h2>
<section class="procedure"><h3>Procedure</h3>
<ol>
<li> Check that there is a way in a Web page to turn off any sound that
plays automatically for more than three seconds.</li>
<li>Check that there is a mechanism, independent from the overall system volume control, to turn off any sound that
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Suggested change
<li>Check that there is a mechanism, independent from the overall system volume control, to turn off any sound that
<li>Check that there is a mechanism, independent from the overall system volume control, to turn off or turn down any sound that

plays automatically for more than three seconds.
</li>
</ol>
</section>
<section class="results"><h3>Expected Results</h3>
<section class="results">
<h3>Expected Results</h3>
<ul>
<li> If step #1 is not true then content fails Success Criterion 1.4.2
</li>
<li>If step #1 is not true then content fails Success Criterion 1.4.2</li>
</ul>
</section>
</section><section id="related"><h2>Related Techniques</h2></section><section id="resources"><h2>Resources</h2></section></body></html>
</section>
<section id="related">
<h2>Related Techniques</h2>
</section>
<section id="resources">
<h2>Resources</h2>
</section>
</body>
</html>