I don't think there is necessarily a right or wrong answer. This is poetry and it depends on how you read and understand it.

Though the word literally means flaw, I don't understand it that way in this verse. "Khuyet ham" here is referring to a feeling that this person has right at that moment. He/she is hoping that the loud noises will soothe/drown this feeling. I think it's a feeling of agony, sorrow or misery due to past experiences/flaws. So to me, this verse is not talking about the flaws themselves but the feelings that are aroused when thinking of those flaws/experiences.