If you prefer to listen to documents rather than read them, ‘text-to-speech’ programmes are available. However, many of these are designed as ‘assistive technologies’ for visually impaired people and read aloud extra information such as interface controls. Both Microsoft Word (2010) and Adobe Reader offer in-built ‘read aloud’ tools which will read text in the document out to you.
Tablets and mobile devices might also have read aloud functionality depending on the specific device. Try looking in the ‘accessibility’ features. Let us know if you have used them successfully.