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hum
(redirected from humming)

    Also found in: Dictionary/thesaurus, Medical, Idioms, Wikipedia 0.03 sec.
hum
Electronics an undesired low-frequency noise in the output of an amplifier or receiver, esp one caused by the power supply
hum [həm]
(electricity)
A sound produced by an iron core of a transformer due to loose laminations or magnetostrictive effects; the frequency of the sound is twice the power line frequency.
(electronics)
An electrical disturbance occurring at the power supply frequency or its harmonics, usually 60 or 120 hertz in the United States.


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