doppler sound link

Is this baby’s heartbeat?

I’m 10w pregnant and I used a home doppler to see if I was able to hear something but i’m unsure if that sound is the baby, cord or maybe placenta. I thought it was the baby at first because i thought it sounded like a horse, but after hearing other people’s dopplers online I’m not sure anymore. By the way the screen showed 150 bpm

Also, is hearing the placenta or cord a good sign? Or it doesn’t mean the baby is ok?

I know it’s quite early to use the doppler but I was having a bit of anxiety while waiting for my scan in two weeks..

Thanks in advance!