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CSS2 Aural 
Aural Style Sheets
声音样式表
Aural style sheets use a combination of speech synthesis and sound effects to make the user listen to information, instead of reading information.
声音样式表使用了结合演讲与声音的效果来让用户可以听信息而不必阅读信息。
Aural presentation can be used:
声音信息可以在下面这些领域得到普及：
- by blind people
针对盲人 - to help users learning to read
学习阅读 - to help users who have reading problems
帮助那些在阅读上有障碍的人 - for home entertainment
家庭娱乐 - in the car
汽车中 - by print-impaired communities
印刷资源不足的地区
The aural presentation converts the document to plain text and feed this to a screen reader (a program that reads all the characters on the screen).
把文字转换为声音的形式(程序可以阅读所有屏幕上的字符)
An example of an Aural style sheet:
声音样式表的举例：
h1, h2, h3, h4 |
The example above will make the speech synthesizer play a sound, then speak the headers in a very rich male voice.
上述例子将起到良好的综合发言，标题会由非常富有磁性的男声来一一道出。
CSS2 Aural Reference
CSS2中的声音参考
W3C: The number in the "W3C" column indicates in which CSS recommendation the property is defined (CSS1 or CSS2).
| 属性 | 描述 | 值 | W3C |
|---|---|---|---|
| azimuth | Sets where the sound/voices should come from (horizontally) 设置或检索当前声音的音场角度（水平） |
angle left-side far-left left center-left center center-right right far-right right-side behind leftwards rightwards |
2 |
| cue | A shorthand property for setting the cue-before and cue-after properties in one declaration 设置在对象前后播放的声音 |
cue-before cue-after |
2 |
| cue-after | Specifies a sound to be played after speaking an element's content to delimit it from other 设置在对象后播放的声音。 |
none url |
2 |
| cue-before | Specifies a sound to be played before speaking an element's content to delimit it from other 设置在对象前播放的声音。 |
none url |
2 |
| elevation | Sets where the sound/voices should come from (vertically) 设置或检索当前声音的音场角度（垂直） |
angle below level above higher lower |
2 |
| pause | A shorthand property for setting the pause-before and pause-after properties in one declaration 设置对象前后的声音暂停。 |
pause-before pause-after |
2 |
| pause-after | Specifies a pause after speaking an element's content 定义对象内容被发音后的暂停。 |
time % |
2 |
| pause-before | Specifies a pause before speaking an element's content 定义对象内容发音前的暂停。 |
time % |
2 |
| pitch | Specifies the speaking voice 设置或检索音高。 |
frequency x-low low medium high x-high |
2 |
| pitch-range | Specifies the variation in the speaking voice. (Monotone voice or animated voice?) 设置或检索声音的平滑程度 |
number | 2 |
| play-during | Specifies a sound to be played while speaking an element's content 设置或检索背景音乐的播放 |
auto none url mix repeat |
2 |
| richness | Specifies the richness in the speaking voice. (Rich voice or thin voice?) 设置或检索当前声音的音色。 |
number | 2 |
| speak | Specifies whether content will render aurally 设置或检索声音是否给出 |
normal none spell-out |
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 指定怎样出列表格的标题 |
always once |
2 |
| speak-numeral | Specifies how to speak numbers 设置或检索数字如何发音 |
digits continuous |
2 |
| speak-punctuation | Specifies how to speak punctuation characters 设置或检索标点符号如何发音。 |
none code |
2 |
| speech-rate | Specifies the speed of the speaking 设置或检索发音速度 |
number x-slow slow medium fast x-fast faster slower |
2 |
| stress | Specifies the "stress" in the speaking voice 和 pitch-range 相似。设置或检索当前声音波形的最高峰值。 |
number | 2 |
| voice-family | A prioritized list of voice family names that contain specific voices 设置或检索当前声音类型。 |
specific-voice generic-voice |
2 |
| volume | Specifies the volume of the speaking 设置或检索音量 |
number % silent x-soft soft medium loud x-loud |
2 |
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