The Read Out Loud Feature in Adobe Reader or Adobe Acrobat reads aloud the text in a PDF.
You must activate Read Out Loud before you can use it. You can deactivate Read Out Loud anytime you wish to do so.
To deactivate do one of the following:
First navigate to the page you want to read:
To change the read out loud preferences (rate, pitch, volume etc.) open Adobe Reader and go to Edit > Preferences > Reading > Read Out Loud Options.