Do your kids sleep better with white noise or without?

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So my two year old son has been using a white noise machine since birth. We live in a house with a lot of people so I found it always drowned out sound. My son broke it today and I'm not sure if I should buy a new one or not. He seems to be ok napping without it but I'm scared hes not going to sleep as well at night with all the noise. Thanks!