It is very nice to hear the noises that happen when there are moving parts...certainly not intentional, and mostly unavoidable...and perhaps that is what makes it worth listening to. Very reassuring. Mechanical they may be, but there is something unpretentious about them.
Got the same peace when watching the waves crash on the seashore. Noise it may be but there is something about that natural sound, unintentional, inseparable from the movement itself, and happening because of the movement, the sound being an integral part of the movement. Donno of others but I thought I could go into deep meditation with just the sound of it listened to uninterrupted. It was difficult to walk off from the shore without some internal process completing..and when i finally did, something was complete within me...and a lot of pieces had fallen into place.
