Anyone?

The noise is very strong irritating and high pitched when I put the "burner" on high, like for wok type cooking.

pulsing.

There was NO noise to be heard when the working demonstrator model heated water in a pot, at the retailer. The noise I hear is not necessarily "normal" !!!

I'm still investigating this.

"Noise

Induction itself is a noiseless process: the energy fields are generated by electronic equipment, which is silent. But even efficient electronics generates some heat. Whether the amount of heat generated can be dissipated "passively" (just by radiation and natural air flow, still silent) or requires a small fan to augment the air flow depends in good part on how tightly a given maker has packed how much power into how much space--some units have fans, some don't. But even on those with fans, one, the fan does not necessarily run all the time--usually just when the unit is running multiple elements at high settings--and two, such fans are normally pretty soft-sounding. There can also an occasional very soft "tick" sound, as the power controller cycles the elements on or off to keep the element power steady and stable.

What can sometimes produce sound with induction cooking is not the induction equipment but the cookware itself. Some of the possible causes include:

*

Encapsulated slugs in the base of the cookware: "clad" cookware (which is what any stainless-steel-finish cookware that works on induction is) has as its base a sort of "sandwich" of layers of several different metals (typically steel outside, aluminum or sometimes copper in the middle, and more steel inside); if the middle layer is merely encapsulated in the steel, as opposed to being actually welded within it, it can move about, however microscopically; but any such microscopic play can give rise to a sort of "buzzing" noise. On some other cooking surface, that buzzing won't happen, but the high-frequency oscillations of induction's magnetic field can cause it in lower-quality clad cookware (but even then, only on higher-power settings). When it occurs it's not typically loud, but it can annoy some people. Again: it's not the induction equipment, it's the less than ideal cookware, but it is an induction-related phenomenon.
*

Loose-fitting handles on cookware, typically when riveted on, can vibrate slightly.
*

Pans with irregular bottoms can vibrate audibly on the glass surface, though again typically only at high-power settings.
*

At high-power settings, lighter-weight lids may occasionally vibrate a bit.

Cookware of solid cast iron, including enamelware, is not subject to such issues; and clad cookware of the top lines should not be."

1. ) minor noise called cycling. The motor cycles on and off. It's acceptable. It can be a slight click and buzz.

2. A.) when pots are empty, or cold, or full with cold stuff, there is an induction buzz, and this is either minor or huge.

2. B.) warm or hot: this noise is less audible.

This is what I have.
(Another induction cooktop will be different.)

So far, I've found that Ikea 365+, Tramontina and All-Clad buzz the least.

In 2008, the same cooktop (same model) performed in a showroom without making ANY noise whatsoever.
It was a stainless pot.

((Was it pure-stainless??)).
This Fall I'll have more news.