Why does the microwave cause noise when operating?

We are in the technological age, where people can do everything easily and quickly thanks to smart, advanced and powerful devices. However, trying to improve technology products is not all, such as microwave ovens.

In the 21st century, people have been able to create electric cars that operate silently, quietly but how the microwave is not perfect, still vibrating and noisy. Why so? Why are they so noisy? According to Science ABC, the short answer is that some components needed to cool, heat the device , and noise are almost inevitable and if the microwave oven is produced, it will be much more expensive. .

If a microwave oven is produced, it will be much more expensive.

What is the structure of the microwave oven?

Using microwaves to heat food seems like a technology from the future, but in fact it has been in the past. A vacuum tube can be easily found in an old semiconductor radio, and for the device to work, the current needs to pass between the electrodes in the tube. The tube is called the magnetron and is located on the back of the furnace with the function of generating food heating energy. The second major component is the waveguide that controls the energy source from magnetron to food. The final element is the steam chamber, sealed and insulated to keep the microwave energy from escaping.

Without using fire, microwave ovens help users save a lot of time in reheating or defrosting food. Magnetrons will interact directly with water molecules in food, requiring them to adapt to the magnetic field inside the microwave, causing them to move very fast, vibrate and increase temperature gradually. Thereby helping to heat food much faster, 10 - 15 times faster than traditional methods.

Why is the microwave noisy when operating?

In fact, the sound emitted from the oven is because the cooling fan must blow continuously to prevent it from overheating.

Many people believe that microwave noise is caused by magnetrons, but the sound frequency of microwaves is much higher than the sound level people hear. In fact, the sound emitted from the oven is because the cooling fan must blow continuously to prevent it from overheating. The magnetron may cause noise but only in certain models. However, the sound emitted is also caused by other components such as diodes, capacitors and transformers during the processing of energy.

If you hear another noise of the microwave like grinding, hissing, it is a sign that the engine of the stirrer is failing or the motor turns old. Although this does not prevent the microwave from operating, it will reduce performance, causing worse noise. And buying new microwave ovens will be cheaper when repairing them because they are old and difficult to repair.

If you are determined to buy a completely silent microwave oven, it will be quite difficult. As mentioned above, noise-inducing components are necessary for microwave ovens to work, but to satisfy user needs, requires manufacturers to make a more complex and more expensive device. Fortunately, the microwave oven only used a few minutes a day, the noise was not unacceptable.