How does Conrad Aiken use imagery in Silent Snow, Secret Snow?

In Part II's conclusion, which takes place following Paul's hostile, paranoid confrontation with his parents, Paul shifts his apprehension abruptly to the room and to the activities in the house. The imagery is impersonal, Hopkinsesque in its disjoint, acute precision:

He could hear the soft irregular flutter of the flames; the cluck-click-cluck-click of the
clock; far and faint, two sudden spurts of laughter from the kitchen, as quickly cut off as begun, a murmur of water in the pipes; . . .