Hello Avatboo The decals can be placed over your device’s mic just like the camera. They don’t block the sound completely, but we’ve found they do a nice job “muffling” the sound especially when you have a computer where the microphone is isolated and contained. For laptops, the mics are located all over the place, next to the camera, buried inside the speakers, next to the headphone jack. We tracked down the location of ten popular laptop mic locations and put together a nice report that comes with Creep Blockers