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See media help. A hum 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 monotone or with slightly varying tones.
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. [ 1 ][ 2 ] They are sometimes named according to the locality ...
Humming serves communication purposes by alerting other birds of the arrival of a fellow forager or potential mate. [71] The humming sound derives from aerodynamic forces generated by the downstrokes and upstrokes of the rapid wingbeats, causing oscillations and harmonics that evoke an acoustic quality likened to that of a musical instrument.
Electromagnetically induced acoustic noise (and vibration), electromagnetically excited acoustic noise, or more commonly known as coil whine, is audible sound directly produced by materials vibrating under the excitation of electromagnetic forces. Some examples of this noise include the mains hum, hum of transformers, the whine of some rotating ...
alarm call, cluck/click, hum, orgle, scream [1] Antelope: snort [2] Badger: growl [3] Badger: Bat: screech, [4] squeak, eek Bats: Bear: roar, growl Bear cub growl: Bee: buzz Hummel bee Xylocopa pubescens (carpenter bee) offsprings: Big cat (Tiger, Lion, Jaguar, Leopard) roar, [5] growl, [6] snarl [7] Tiger growl Jaguar making a content "sawing ...
The human voice consists of sound made by a human being using the vocal tract, including talking, singing, laughing, crying, screaming, shouting, humming or yelling. The human voice frequency is specifically a part of human sound production in which the vocal folds (vocal cords) are the primary sound source. (Other sound production mechanisms ...
Mains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity. The fundamental frequency of this sound is usually double that of fundamental 50/60 Hz , i.e., 100/120 Hz, depending on the local power-line frequency .
Bullroarer. The bullroarer, [1] rhombus, or turndun, is an ancient ritual musical instrument and a device historically used for communicating over great distances. [2] It consists of a piece of wood attached to a string, which when swung in a large circle produces a roaring vibration sound. It dates to the Paleolithic period, being found in ...