XSL-FO speech-rate Property


Definition and Usage

The speech-rate 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:

  • for blind people
  • in the car
  • help users learning to read

The speech-rate property specifies how fast the text should be read - the speaking rate.


  • Inherited: yes
  • Percentages: N/A
  • Media: aural

Property Values

Value Description
number A number that specifies the speaking rate in words per minute
x-slow 80 words per minute
slow 120 words per minute
medium Default. 180-200 words per minute
fast 300 words per minute
x-fast 500 words per minute
faster Current speech-rate + 40
slower Current speech-rate - 40



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