hum


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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 ?
Incident Alert & Emergency Assistance notifies the hum emergency response center if the system detects an incident.
Carl Hum joins REBNY from Asian Americans Advancing Justice (AAJC) in Washington, DC where he served as Vice President of Policy and Programs.
For the big night on Thursday, the third edition of the awards, Pakistani TV stars featuring in Hum TV will be out in full force.
The ride started in 2009 when Hum was a student at Boston University.
Usually we go out and collect hums by asking people to hum, this is the first time we have had a humming booth," Dr Kim said.
But the cause behind the hum, and the reason why it affects just a tiny percentage of the population in certain areas, is still a mystery, despite many scientific investigations being conducted.
A Discovery Workshop conducted by Minerva provided HUM with the confidence that Aras Innovator could deliver the scope of the pilot required and allowed all parties to recognize the complexity of the HUM new model process requirements.
The title of the film, which is being produced and directed by Jyotin Goel, reminds one of Juhi's hit film Hum Hain Rahi Pyar Ke.
She shot at night for Lafange Parinde and then went to shoot for Khelenge Hum Jee Jaan Sey for the rest of the day," a source says.
Commenting on the launch, Claudia Cascia, Product Manager Yeast Extracts, DSM Food Specialties, said: "By combining savoury taste with umami impact, Gistex HUM LS is the ideal starting point in the development of full-flavoured products.
REGARDING your story about a hum heard in Minfordd I too have frequently experienced a hum during the last few years.
The Marton hum was what its name said - a pervasive, untraceable, throbbing noise, disturbing local residents night after night.