I just tried it. They seemed curious and paused to listen, but my voice isn't very deep, so they weren't mesmerized or anything like that. I wonder why they do that, though. I should try different noises with them and see if there's any pattern to it.I wish I could get a video up. Of all the noises I've made (and I've tried a lot of noises), the bass has their attention. They all stand so still and quiet like I've never seen. They're usually sleeping or peeping (well their quacks are well on the way). I advise you to try it with yours.