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The Hum is persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported in many countries ...
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.
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The report "A Review of Published Research on Low Frequency Noise and its Effects" [54] contains a long list of research about exposure to high-level infrasound among humans and animals. For instance, in 1972, Borredon exposed 42 young men to tones at 7.5 Hz at 130 dB for 50 minutes.
The definition of the Hum, made at the beginning of the article, should be respected: "The Hum is a phenomenon, or collection of phenomena, involving widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise not audible to all people”, and: ”Recent data from (not only) English speaking countries ...
Low frequency (LF) is the ITU designation [1] [2] for radio frequencies (RF) in the range of 30–300 kHz. Since its wavelengths range from 10–1 km , respectively, it is also known as the kilometre band or kilometre waves .
Electrical network frequency (ENF) analysis is an audio forensics technique for validating audio recordings by comparing frequency changes in background mains hum in the recording with long-term high-precision historical records of mains frequency changes from a database.
Behadd (Urdu: بے حد; English: Boundless) is a 2013 Pakistani drama film directed by Asim Raza, produced by Momina Duraid, and written by Umera Ahmad. The telefilm stars Fawad Khan, Nadia Jamil, Sajjal Ali, Nadia Afgan, Adnan Siddiqui, Adnan Jaffar and Shamoon Abbasi in pivot roles. [1] Behadd premiered on 23 February 2013 on Hum TV. [2]