A simple trick to turn your Match resources into Sound Match resources:
1. Add speak:: at the beginning of your left match items.
2. Add text-to-speech (TTS) to the left match items (by selecting the language on the "Extras" tab).
Your matching items will look like this:
The result is activities where the left-hand text is spoken but not shown on the screen. See the embedded examples below. (Click to open.)