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The Hum is a name often given to widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported all over the world, including the United States, the United Kingdom, Australia and Canada.
A hum /hʌm/; Latin: murmur, The sound of giraffes humming is a sound made by producing a wordless tone with the mouth closed, forcing the sound to emerge from the nose. To hum is to produce such a sound, often with a melody. It is also associated with thoughtful absorption, 'hmm'. A hum has a particular timbre (or sound quality), usually a ...
In music, a drone is a harmonic or monophonic effect or accompaniment where a note or chord is continuously sounded throughout most or all of a piece. A drone may also be any part of a musical instrument used to produce this effect; an archaic term for this is burden (bourdon or burdon) [1] [2] such as a "drone [pipe] of a bagpipe", [3] [4] the pedal point in an organ, or the lowest course of ...
Sleep noises are rhythmic, soothing sounds designed to help you drift off. “Most of the time, when sleep noise helps, it’s because it’s masking extra sounds—such as a slamming door, car ...
As one of the scientists, Dr. Simone Baumann-Pickering, describes, "It's not that loud, it sounds like a buzzing or humming, and that goes on for an hour to two hours, depending on the day."
Music that contains drones and is rhythmically still or very slow, called "drone music," [2] can be found in many parts of the world, including bagpipe traditions, among them Scottish pibroch piping; didgeridoo music in Australia, South Indian classical Carnatic music, and Hindustani classical music (both of which are accompanied almost invariably by the Tanpura, a plucked, four-string ...
The torsional deflection of a simple cylinder cannot radiate efficiently acoustic noise, but with particular boundary conditions the stator can radiate acoustic noise under torque ripple excitation. [8] Structure-borne noise can also be generated by torque ripple when rotor shaft line vibrations propagate to the frame [9] and shaft line.
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