Sound from our Heartbeat

Scientists have proved that the sound which comes from a heartbeat is LUB-DUB.. But now they analyze that it is RUB-RUB.. RUB is an arabic word which mean who made each everything that is ALLAH.. The Holy Prophet (S.A.W) said stop doing everything during teh AZAN, even reading the Quran.. The person who talks during the AZAN will not be able to say KHALIMAH SYAHADAH on his/her death bed..