Everyone has that one sound that makes their skin crawl. Maybe it is a colleague who keeps clicking a pen during a meeting, or someone chewing loudly beside you on a quiet train. These everyday noises ...

Dear Meghan: My 6-year-old daughter can’t tolerate the sound of her 4-year-old sister’s chewing. The moment she hears her sister eating, my older one immediately gets upset. But here’s the thing — she ...