Noises at / at the induction cooker

The induction hob is the most modern technology available for cooking. But time and again, owners of an induction cooker complain about noises that occur during cooking. Below we explain how and why different sounds can be heard around the induction cooker.

From the halogen ceramic hob to the induction hob

Conventional glass ceramic hobs with halogen technology have begun their triumphal march in the 1990s and have since been the market leader. In the meantime, however, they are being replaced by more and more kitchens from hobs, which at first glance do not look any different: induction hobs. Since they also have a surface made of glass ceramic, of course, this high similarity.

Just like at first glance

However, the technology is completely different from the conventional ceramic hob. With the advantages and disadvantages of the induction hob, it is above all the advantages that make suppliers, as well as consumers, praise such hobs in appropriate tones:

  • Up to 30 to 50 percent less power consumption (relative to electric cooker or halogen hob)
  • Up to 30 percent faster heating of the food, especially when cooking
  • high safety in households with children, because nothing heats up without a pot on the plate
  • extremely precise dosage of heat

Induction cooking can be accompanied by noises

But it can also come to sounds that are connected to the induction cooking. These range from hum and hum to a patter and crackle. The sounds can be of different origin and thus have different causes:

  • Use of unsuitable or conditionally unsuitable pots and pans
  • technically caused by the induction field noises
  • rather accidental events (unfavorable amounts of food in cooking containers, constellation of pots)
  • not optimal installation (fitted kitchen looks like sound box)

The functioning of the induction hob

To understand why different sounds can occur, it is important to first understand the principle of cooking on an induction hob. A copper coil under the glass ceramic generates an alternating magnetic field in a frequency range between 20 and 60 kHz. This creates electromagnetic alternating fields and heat is generated. In particular, ferromagnetic materials concentrate these alternating fields and heat them even more efficiently (even faster, even hotter).

Although considerably less heat is radiated onto the glass ceramic surface, it also heats up over time. Therefore, the underlying control panel electronics must also be protected against overheating, since it is relatively sensitive. These fans are used. Of particular interest in induction cooking but above all the fact that the heat in the pot or the pan itself arises.

Unsuitable or conditionally unsuitable cooking containers

This brings us to the cooking pots and pans, which can be responsible for noises. If the floor is not completely flat, noise may be generated as the pot or pan begins to vibrate. But also multi-layered materials of pots, so for example aluminum pots with a ferromagnetic base plate, tend in low quality to considerable noise.

Even a crackling or crackling is possible because the different materials react differently thermally. As a result, only pots and pans should be used which are designated for induction cooking. In addition, you should only rely on the products of established brand manufacturers to also exclude lower processing quality as a cause of noise.

Technically conditioned noises

The fan for the electronics can be heard. In particular, with increasing age, the drive shafts of such fans can shrink and amplify noise significantly. But even the copper coil itself can develop sounds. In particular, at the highest cooking level (power boost, turbo boost, etc.) is to be expected with a hum or hum.

Problematic installation of the induction hob

In some very rare cases, installation from the induction hob may be unfavorable. Then one of the already mentioned sounds, such as the humming or humming of the coil or fan, is created. But a little optimal installation affects the emerging sound waves in this area of ​​a fitted kitchen like a sound box and amplifies not only the sounds, but of course the perception.

To change the feet of the corresponding kitchen cabinet, so as to change the voltage of this component, may help if necessary. At worst, it only helps to insulate the space required for ventilation with refractory soundproofing material, as long as this is in line with the Induction Panel installation instructions. It may be necessary to seal the frame from the ceramic hob in a vibration-free manner.

Rather random constellations

In addition, however, especially in multi-layer pots and pans there is the risk that in an unfavorable and very specific weight range, these noises in the pot or pan arise. Likewise, the magnetic field can produce an interaction with a pot or a pan of the same type, if one of the containers is heated to the maximum, the other is not - and both pots are again multi-layered. In particular, if the pots are slightly smaller than the respective hob.

Tips & Tricks

A ceramic hob may also be an induction hob. Although the term "Ceranfeld" has established itself colloquially for cooktops with halogen technology among consumers, but you can of course also name an induction hob as ceramic hob.

Video Board: Noisy induction sound. Is this normal?