Schema.org Property: speakable - Indicates sections of a Web page that are particularly 'speakable' in the sense of being highlighted as being especially appropriate for text-to-speech conversion. Other sections of a page may also be usefully spoken in particular circumstances; the 'speakable' property serves to indicate the parts most likely to be generally useful for speech.
The speakable property can be repeated an arbitrary number of times, with three kinds of possible 'content-locator'...
