The generally accepted standard to minimize hearing risk is based on an exposure to 85 dBA (noise level)for a maximum limit of eight hours per day, followed by at least ten hours of recovery time at 70 dBA or lower (at which the risk of harm to healthy ears is negligible). Then a "3-dB exchange rate" formula is applied, which means that for every 3 dB above 85 dBA, the maximum exposure time is cut in half.
The one that does not occur during a typical labor would be: The umbilical cord breaks.
The umbilical cord (the placenta) wouldn't break even after the baby came out from the mother's body. It has to be manually cut out by the doctors after the labor is finished
100 compressions a minutes then give breaths every 3-4 seconds for 30 seconds
