93 Honda Civic: Noise when I am manual downshifting

Just noticed this today. When I downshift to approach an intersection / driveway, I hear a sound that is almost like whirring/flute like. I know that sounds silly, but it is not at all a grinding or squealing.

I’ve owned the car since 99, and I haven’t had to replace the clutch. I get regular maintenance / oil changes (and then some…new timing belt, oil plan…and so on.) Just over 163k on it.

any ideas for me? Thanks in advance!

~ D

Why are you downshifting? Why not use the brakes instead?

When was the last time the transmission oil was changed?