Comment by mh-

I don't have Max, but something similar happens with the AirPods Pro. See if you have "conversation awareness" and "hearing protection" turned on (both are on by default.) They're in the AirPods settings screen accessed via the bluetooth menu.

I'd suggest experimenting by disabling both and trying to repro. Then re-enabling the features one at a time.

I've never triggered it on the Pro by merely speaking loudly, but they're earbuds and farther from my mouth. What does trigger it for me reliably, is sneezing.