A listening map does not have to look like a score. A few shapes can record the events you want to remember: a voice entering, a dense section or a sudden gap. The map is useful if it helps you return to the recording.
Choose three symbols
Try a circle for a new voice, a shaded block for a dense texture and a short vertical mark for a clear stop. These are personal conventions, not standard musical symbols. Write a key at the top of the page.
Draw a horizontal line and leave enough room for the full passage. On the first pass, mark only obvious events. Trying to capture every sound can make the page less readable.
Add locations you can use
Include a few timestamps on the second pass. If two symbols overlap, decide whether the overlap matters or whether one mark was simply misplaced. Correct the map openly rather than treating your first impression as final.
You can use words where a symbol becomes awkward. The drawing serves the listening, so it does not need an elegant visual system.
Test the map tomorrow
Use it to find one moment without replaying everything. Pair the map with an exercise on musical gaps. A small, readable record often preserves a discovery better than a crowded page that tries to explain the entire piece.