📅 最后修改于: 2020-11-05 09:03:12 🧑 作者: Mango
CSS Aural Media或CSS样式表用于将特定的声音样式功能附加到特定的文档元素。它使用语音合成和声音效果来帮助用户听信息而不是阅读信息。因此，它对视障人士非常有用。
可以在以下场合使用听觉介质：
以下是听觉媒体属性的列表：
| property | explanation | value |
|---|---|---|
| azimuth | it is set where the sound should come from. |
angle left-side far-left left center-left center center-right right far-right right-side behind leftwardsrightwards
|
| cue | it is used to set the cue properties in one declaration. |
cue-beforecue-after
|
| cue-after | it is used to specify a sound to be played after speaking an element’s content. |
none url
|
| cue-before | it is used to specify a sound to be played before speaking an element’s content. |
noneurl
|
| elevation | it is set where the sound should come from. |
angle below level above higherlower
|
| pause | it is used to set the pause properties in one declaration. |
pause-beforepause-after
|
| pause-after | it is used to specify a pause after speaking an element’s content. |
time %
|
| pause-before | it is used to specify a pause before speaking an element’s content. |
time %
|
| pitch | it is used to specify the pitch of the speaking voice. |
frequency x-low low medium high x-high
|
| pitch-range | it is used to specify the variation of the speaking voice. it specifies whether he speaking voice is monotone voice or animated voice. | number |
| play-during | it specifies a sound to be played while speaking an element’s content. | auto
none url mix repeat
|
| richness | it is used to specifies the sound quality of the speaking voice. it specifies that the voice is rich or thin. | number |
| speak | it specifies whether content will render aurally. |
normal nonespell-out
|
| speak-header | it is used to specify how to handle table headers. it also specifies whether the headers be spoken before every cell, or only before a cell with a different header than the previous cell. |
always once
|
| speak-numeral | it specifies how to speak numbers. |
digits continuous
|
| speak-punctuation | it is used to specify how to speak punctuation characters. |
nonecode
|
| speech-rate | it specifies the speed of the speaking. |
number x-slow slow medium fast x-fast fasterslower
|
| stress | it is used to specify the “stress” in the speaking voice. | number |
| voice-family | it specifies the voice family of the speaking voice. |
specific-voice generic-voice
|
| volume | it specifies the volume of the speaking voice. |
number % silent x-soft soft medium loud x-loud
|