In other neighborhoods around the globe, however, Mr. Ciofalo has company, other people who complain of hearing a persistent humming sound, usually when they are in their homes seeking peace and quiet from a busy world.
The station emits a persistent, unsettling hum audible from over a mile away.
But innerness -- this persistent internal hum -- is more than lamentation and desire.
And there is a persistent background hum of criticism about the accuracy or reliability of the enterprise, emanating either from aggrieved rivals (like Encyclopaedia Britannica) or more detached sceptics.
The Hum, a persistent, low-frequency noise, audible only to certain people and with no identifiable source, was first reported in the mid-1960s.
Dr. Doeleman had planned to spend the night working out new techniques to point the telescope, which among its other problems was afflicted by a persistent and annoying electrical hum.
The drama, the spectacle, the emotion, the persistent low-grade background hum: even before the first weekend of the monthlong World Cup tournament was over, it was clear that at this gathering of some of the planet's finest athletes, the first breakout star wasn't a Ronaldo or a Messi; it was an uncountable number of vuvuzelas.
All available EEG was visually checked for bad channels such as absence of signal, hum, clipping, persistent muscle tone artifacts, and external noise.
Andrew Clarke, Ipswich Film Theatre trustee, said he has longer-term concerns: "Trolleys crashing about and the hum of refrigeration units could be a persistent and annoying problem.
The people who hear a hum do not appear to be suffering from tinnitus, a persistent ringing in the ear that is not produced by an external source.
