Resumen de Din for Dinner.
The article discusses a study by mechanical engineers from MEF University and Istanbul Technical University in Turkey, published in the March 2015 issue of "Applied Acoustics," which determined that the popping or cracking noises made by no-frost refrigerators was caused by the heater running between warming and cooling phases to prevent ice buildup. The noises occur during rapid temperature changes that cause contraction and expansion of the refrigerators' materials.
