Charles Spurgeon Commentary Ecclesiastes 12:4

"and the doors shall be shut in the street; when the sound of the grinding is low, and one shall rise up at the voice of a bird, and all the daughters of music shall be brought low;" — Ecclesiastes 12:4 (ASV)

And the doors shall be shut in the streets, when the sound of the grinding is low, and he shall rise up at the voice of the bird, and all the daughters of musick shall be brought low;

The old man sleeps very lightly; anything awakens him. He hides away from public business. The doors are shut in the streets.