A burp sound is not important. Just hold the baby upright for a few minutes. For most babies 3-4 minutes is more than enough.

<b><font color ="#3b5998"> @637244799d0e1b00168a5162 </font></b> baby will not burp always but as <font color ="#3b5998"><b> @616d51e8ca67e40013aa9222 </b></font>said you should keep the baby upright for 10-20 helps in settling feed...the baby have less colic issues and no vomit

hold baby upright fr upto ten mins. babies dont always burp.