6. NORMAL REFRIGERATOR NOISE
caused by the air flowing inside the refrigerator.
The insulation used amplifies sound levels.
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The refrigerating gas may produce bubbling sounds as it flows through
the circuits.
The compressor may buzz and/or produce slight knocking, which may
be more marked on starting.
Cracking sounds produced by expansion and contraction of the
materials used.
If your apparatus has a ventilator, you will hear a whispering sound
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