From http://www.w3schools.com (Copyright Refsnes Data)
The stress property is used only in Aural Stylesheets.
The aural rendering of a document combines sounds and voices to go through the content of a document. Aural presentation occurs often by converting the document to plain text and then feeding this to a screen reader.
Situations and markets for listening to information could be:
The stress property specifies the height of "local peaks" in the speaking voice.
| Value | Description |
|---|---|
| number | Default is 50. A specified value between 0 and 100. The meaning of values depends on the language. A value of 50 for an English speaking voice would be different from a value of 50 for an Italian voice |
From http://www.w3schools.com (Copyright Refsnes Data)