Heartbeat sound effects

Baby: girl, 14 weeks old, having fun

2615 610

Heart rate monitor: unstable signal

3587 1136

Horror: double heart strike (fast)

3771 1078

Horror: double heart beat (slow)

4151 1009

Boy, 18 weeks

3824 1142

Boy 18 weeks whimpering

3453 929

Boy 18 weeks, hysterical crying

3185 970