Is the cookware made of different materials?
A crackling sound may occur when cookware consisting of different materials are used. The noise is caused by vibrations in the joint faces between the different layers. It may change depending on the amount and type of food being cooked.
NOTE: People with a pacemaker or similar medical device should use care when standing near this induction cooktop while it is on. The electromagnetic field may affect the pacemaker or similar device. Consult your doctor, or the manufacturer of the pacemaker or similar medical device for additional information about its effects with electromagnetic fields of the induction cooktop.