When I only had one mountain bike and no other bike- I knew the sound of it- and from experience any sound that came from it meant something as I had probably had it before. Then I got into multiple bikes and new sounds were ---new.
Used to take me ages to find out what was causing the "New" sound- but luckily it was normally just a bit of adjustment somewhere. But one did get me- A clicking sound coming from the front of the bike when I turned the bars under load. Changed the headset bearings- Adjusted tension on the stem- Tightened the bars on the clamp- And still there. I now know that sound so well that when another rider asked me what the sound was on the front of his bike a couple of weeks ago- I told him to either put his bars down to the level he had them at before he adjusted them up- Or put new- longer outer cables onto his gear cables.
Bet you recognise that sound and know the cure in another 30,000 miles when it occurs again.
__________________
How long was I in the army? Five foot seven.
Spike Milligan