Anybody that has a Doppler or even if you know about them please help me out.. I know the sound of…

Anybody that has a Doppler or even if you know about them please help me out.. I know the sound of my little lady's heartbeat 😍 and I've listened to my own but am I right in thinking that the placenta sounds a little like blowing wind? Ive heard it when she kicks but what would the slow heartbeat sound be in my tummy because it doesn't sound like mine and I hear my girls fine? Just wondering :) thank you x