It depends on what their trigger is. Since these are only $20, I don’t see the harm in seeing if they are helpful for your step-child. I personally have had great success with silicone ones from the drug store paired with noise-cancelling headphones. Loop claims to allow you to hear talking while reducing other sounds. This will depend if the sounds that trigger your step child are those that loop “filters”. I believe through Amazon you can return them, so maybe order there?

Here is the amazon link: https://amzn.to/3JlJ0S4