/* spec information about this property
name= speech-rate
css1= NA
css2= http://www.w3.org/TR/2008/REC-CSS2-20080411/aural.html#propdef-speech-rate
css21= http://www.w3.org/TR/2011/REC-CSS2-20110607/aural.html#propdef-speech-rate
css3= NA
*/