Adding to what Juneknow said thin pans or kettle on boost or hi from a cold start will make more noise until either warmer or you have reduced the power, in either case not annoying just a fact. When using cast iron I have been told to start on low power, say maximum of 3 for a minute or two before upping to medium 5 with probably a top level of 7, your cast iron will soon be sizzling at that level. In any case NEVER use boost on cast iron. When cooking an egg dish in a small cast iron fry pan I find after a brief heating at up to 5 l am back to 3 or less to finish cooking.

Yes, there is some buzzing. We use All Clad d5 pots and pans. I have auditory sensitivity and the buzzing does not bother me at all.

There is some buzzing, but only with my All Clad. It doesn't bother me, it just slightly move the pan and it usually stops. Most often happens when I use a small/mini pot on the big hob. I have not noticed it with my Scanpan, cast iron, or LC cookware. HTH!

Great. Thank you.