system
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human
[Marvel] How can Susan Storm's psionic shields be broken other than by using brute force and magic?

Looking for an in universe answer (maybe it's already been done) or maybe a science based answer.
I read on the Marvel wiki that her force fields are permeable to sound waves (which as far as I know need a medium to travel), so does that mean an airborne toxin or something similar can easily pass through??

TIA.
gpt
You don't need the Marvel wiki to tell you her shields are permeable to sound waves. If they were not, no one outside her shield could talk to someone inside, but that happens all the time.

A sound wave doesn't require the medium to pass through, just the wave. Waves can transfer from one medium to another. That's how a microphone works: sound waves strike a diaphragm, causing it to vibrate. The diaphragm is attached to a coil, which generates a small electrical current. (Speakers work the same way, but in the other direction.)

So for a sound wave to pass through, all it has to do is cause some kind of vibration in the shield (this could be just a modulation of the shield's energy) which then gets transferred to the air on the other side by the the same process in the other direction. No actual air or other matter needs to pass through.