Sound proof laptop bag? Sheets? Blocking integrated mic

Looking for something to essentially physically block the mic in my lenovo t14 provided by my job, sometimes I’d like to leave it on, lid closed, but I noticed the mic array still picks up a lot of audio its very sensitive. Even using a piece of tape does nothing, putting a normal bath towel over the laptop, lid closed, tape on mic holes, it picks up clear voice.

I use a separate mic with a hardware switch, so blocking …

blocking laptop mic privacy sound