hum

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Related to hums: Huns, UHMS

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 ?
Magloire says the Windsor Hum will appear alongside the mysterious formation of Devils Tower in Wyoming; a lightning storm in Venezuela that lasts 10 hours a night, 300 nights a year; and the Crooked Forest, a cluster of oddly-shaped pine trees in Poland.
And yet we're still only beginning to understand our planet's hum. And scientists have been limited for years because they only knew how to measure it from land, while nearly three-quarters of the globe is underwater.
Jean McLeish THROUGHOUT this summer Aberdeen people were asked to hum to help create a piece of music that will be showcased during the city's annual Sound Festival.
As part of the new agreement, Transworld Aviation will offer operators Honeywell's Zing Hums 1100/1200/1400 series.TWA is ideally suited as Honeywell's distributor of choice with its long-standing experience insupplying aircraft parts within the UAE.
The computer system will collect aircraft data from whatever HUMS system the Army chooses for the new CH-47E The Army is defining the requirements for a Chinook HUMS that will lead to a competitive procurement.
Maintenance officers, pilots, commanders, and safety and standards officers view data collected by the IMD HUMS. The information collected shows restrictions, inefficiencies, inspections, and service schedules of aircraft.
Operators with HUMS equipped aircraft, once registered with the Bell, will be able to access data on mobile devices, using MissionLinkTM, an innovative off-board data platform that delivers intuitive analysis to customers.
In Washington, Assistant Secretary of State Jeffrey Feltman told the Senate Foreign Relations Committee the Assad regime had "intensified its vicious campaign of attacks against the Syrian people today's reports from Hums are truly alarming.
Three different levels of FlyScan are available for the H225, H175, H145, H135 and Dolphin fleets equipped with HUMS:
The gas can be used in place of naphtha as a feedstock for producing ammonia/urea at a nitrogenous fertiliser plant in Hums. Clean gas can also be supplied to a 600MW power station and a steel complex at Zara', near Hums.
This is why the battles for Hums will be particularly bloody in the coming weeks and/or months.
The HUMS will help operators to keep their AC313 in the air by enabling improved maintenance planning and reduced downtime for their fleet.