Does anyone have any suggestions on how to dissuade a baby from squealing? My 8 month old son started squealing when he was about 4 months old. Initially I think it was out of excitement, but I never imitated or encouraged it. Now it's hard to know what it is because he does it constantly - when he's happy, excited, tired, bored, cranky, hungry, at home, on the subway, in the stroller. The sound is ear piercing and driving both my husband and I crazy. We've tried saying "No" every time he does it, but it doesn't seem to make any difference and happens so frequently that we feel as if we're saying no to him all the time. Any advice would be greatly appreciated as we are just feeling so helpless!