I experimented a bit with an Apple laptop microphone, and it took 2 layers of electrical tape to block the mic. There doesn't appear to be any way to block an i

I experimented a bit with an Apple laptop microphone, and it took 2 layers of electrical tape to block the mic. There doesn't appear to be any way to block an iPhone mic without blocking the speaker, too, and I'm not confident that it could be blocked at all.