Do home dopplers harm the baby if used to often???

💑 • .
The last time I was pregnant, I miscarried. This time I got a Doppler and being able to find the heartbeat any time I felt like worrying, was an amazing emotional boost! Recently we were just reading how using a Doppler to often could be harmful to the baby because of some for high frequency waves it emits. I was using it nearly every day!😰 Please, any thoughts on this???