ミソフォニアの人は、気になる音を無視できないのでしょうか?
No. This is like asking someone with an allergy to just ignore the thing they are allergic to. Misophonia is a legitimate sensory disorder, not a matter of choice or preferences.
A misophonic reaction is not voluntary and exposure to an activating stimulus—a noise or, sometimes, a visual movement—can make things worse for someone with misophonia.