The fridge freezer causes a very high-pitched tone when cooling. Dier whistle is asymmetrical and extremely unpleasant. Furthermore, to compare the noise of the refrigerator with a dishwasher. We bought the device because of the good rating by Stiftung Warentest. Unfortunately, the noise level is unacceptable and very unsuitable for a kitchen. Otherwise the fridge freezer meets all aspects, as advertised.