CSS speech-rate property

The speech-rate property specifies the speaking rate. Note that both absolute and relative keyword values are allowed.

The possible values are -

• number − Specifies the speaking rate in words per minute.
• x-slow − Same as 80 words per minute.
• slow − Same as 120 words per minute.
• medium − Same as 180 - 200 words per minute.
• fast − Same as 300 words per minute.
• x-fast − Same as 500 words per minute.
• faster − Adds 40 words per minute to the current speech rate
• slower − Subtracts 40 words per minutes from the current speech rate.