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hum

Electronics an undesired low-frequency noise in the output of an amplifier or receiver, esp one caused by the power supply

Hum

 

the name given during the Middle Ages to the region between Dubrovnik and the Neretva River. The earliest surviving reference to Hum dates from the 10th century and describes the region as subject to the Serbian prince Mihajlo Višević. Late in that century the region became part of Samuil’s state, and in 1018 it fell under Byzantine control. Hum became part of Zeta in the second half of the 11th century, part of the Nemanja state in the late 12th century, and part of Bosnia in the 1320’s. Duke (herceg) Stepan Vukčić took control of Hum in the 1440’s. The duke’s dominions, of which Hum constituted a major part, became known as Hercegovina in the mid-15th century.

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.
References in periodicals archive ?
GM stopped producing Hummers in 2009, the year it underwent restructuring and a government-sponsored bankruptcy.
Senator Burris' office has confirmed the talks and his desire to see what ideas come out of the Hummer Motors Summit, so that he can see what assistance can be offered by the government to help to save Hummer.
Hummer traces its origins to the Humvee military vehicle and acquired a devoted following among SUV lovers and celebrities.
We are excited about some of the initiatives already underway at Hummer that we believe our investment will be able to accelerate, particularly related to the creation of the next generation of more fuel-efficient vehicles to meet not only future regulations but also customer expectations,'' he said.
Aaron Bragman, an auto analyst with IHS Global Insight, said GM s move to jettison Hummer would help the automaker rebuild its image as more environmentally responsible.
The Hummers with the big wheels and a lot of chrome are among our most popular," the Daily Telegraph quoted him as saying.
If it goes through, more than 3,000 jobs would be saved at Hummer factories and dealerships across the US.
According to the nonprofit Consumers Union, publisher of Consumer Reports magazine, General Motors (GM) developed the less-expensive Hummer H3--in the wake of shrinking sales of its larger H1 and H2 models--to compete with other midsized Sport Utility Vehicles (SUVs) in the mid-$30,000 price bracket, such as the Ford Explorer, Honda Pilot, Toyota 4Runner and Jeep Grand Cherokee.
Last year, Dublin mobster 'The Monk' splashed out EUR500,000 for a special version of the Hummer.
Hummer have launched a male fragrance that has phwoarXphwoar pulling power when it comes to the ladies - a scent as big and demanding as the 888.
The NIGHTDRIVER system is the only thermal imaging automotive driving system offered for the HUMMER H1 and HUMMER H2.
Fiser wouldn't disclose how much Landers gave him for the Hummer dealership rights, but said it was "worth my while.