Describe the mood of this passage.

"The atmosphere is stifling, sluggish, leaden. Outside, you don't hear a single bird, and a deathly, opressive silence hangs over the house and clings to me as if it were going to drag me into the deepest regions of the underworld. At time like this, Father, Mother and Margot don't matter to me in the least. I wander from room to room, climb up and down the stairs and feel like a songbird whose wings have been ripped off and who keeps hurling itself against the bars of its dark cage. 'Let me out, where there's fresh air and laughter!' a voice within me cries."