听觉样式表可把语音合成与音响效果相组合,使用户可以听到信息,而无需进行阅读。
听觉呈现可用于:
听觉呈现通常会把文档转化为纯文本,然后传给屏幕阅读器(可读出屏幕上所有字符的一种程序)。
听觉样式表的一个例子:
h1, h2, h3, h4{voice-family: male;richness: 80;cue-before: url("beep.au")}
上面的例子可以让语音合成器演奏一段声音,然后用男性的声音读出标题。
W3C : "W3C" 列的数字显示出属性由哪个 CSS 标准定义(CSS1 还是 CSS2)。
属性 | 描述 | 值 | W3C |
---|---|---|---|
azimuth | Sets where the sound/voices should come from (horizontally) |
| 2 |
cue | A shorthand property for setting the cue-before and cue-after properties in one declaration |
| 2 |
cue-after | Specifies a sound to be played after speaking an element's content to delimit it from other |
| 2 |
cue-before | Specifies a sound to be played before speaking an element's content to delimit it from other |
| 2 |
elevation | Sets where the sound/voices should come from (vertically) |
| 2 |
pause | A shorthand property for setting the pause-before and pause-after properties in one declaration |
| 2 |
pause-after | Specifies a pause after speaking an element's content |
| 2 |
pause-before | Specifies a pause before speaking an element's content |
| 2 |
pitch | Specifies the speaking voice |
| 2 |
pitch-range | Specifies the variation in the speaking voice. (Monotone voice or animated voice?) |
| 2 |
play-during | Specifies a sound to be played while speaking an element's content |
| 2 |
richness | Specifies the richness in the speaking voice. (Rich voice or thin voice?) |
| 2 |
speak | Specifies whether content will render aurally |
| 2 |
speak-header | Specifies how to handle table headers. Should the headers be spoken before every cell, or only before a cell with a different header than the previous cell |
| 2 |
speak-numeral | Specifies how to speak numbers |
| 2 |
speak-punctuation | Specifies how to speak punctuation characters |
| 2 |
speech-rate | Specifies the speed of the speaking |
| 2 |
stress | Specifies the "stress" in the speaking voice |
| 2 |
voice-family | A prioritized list of voice family names that contain specific voices |
| 2 |
volume | Specifies the volume of the speaking |
| 2 |
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