Learn how to transcribe old documents by simply dictating them into Microsoft Word or similar software.  Using this technique allows you to transcribe many documents faster just by reading them using a microphone and then editing as you go.

Here are really good and affordable microphones to help with your dictation.

Blue Yeti USB Microphone 

BOYA by-M1 Lavalier Microphone

2 Microphone Splitter – Y-Splitter – for Lavalier Microphone