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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. Hums have been widely reported by national media in the UK and the United States. The Hum is sometimes prefixed with the name of a locality where the problem has been particularly publicized: e.g., the "Bristol Hum" or the "Taos Hum". Data from a Taos Hum study suggests that around two percent of the population could detect the Taos Hum. For those who can hear the Hum it can be a very disturbing phenomenon. Among those who cannot hear the hum and some specialists, there has been skepticism about whether it exists; it is distinct from, and should not be confused with, the term sometimes used to describe the well-attested phenomenon of microseisms.〔(Ardhuin, Fabrice, Lucia Gualtieri, and Eleonore Stutzmann. "How ocean waves rock the Earth: two mechanisms explain seismic noise with periods 3 to 300 s." Geophys. Res. Lett. 42 (2015). )〕 ==Description== The essential element that defines the Hum is what is perceived as a persistent low-frequency sound, often described as being comparable to that of a distant diesel engine idling, or to some similar low-pitched sound for which obvious sources (e.g., household appliances, traffic noise, etc.) have been ruled out. There are a number of audio reproductions of the Hum available on the web, as well as at least one purported recording. Other elements seem to be significantly associated with the Hum, being reported by an important proportion of hearers, but not by all of them. Some people hear the Hum only, or much more, inside buildings as compared with outdoors. Some perceive vibrations that can be felt through the body. Earplugs are reported as not decreasing it.〔 For those who can hear the Hum, it can be a very disturbing phenomenon and it has been linked to at least three suicides in the UK. A study into the Taos Hum indicated that at least two percent could hear it; each hearer at a different frequency between 32 Hz and 80 Hz, modulated from 0.5 to 2 Hz.〔 Similar results have been found in an earlier British study. It seems to be possible for hearers to move away from it, with one hearer of the Taos Hum reporting its range was 48 km.〔(【引用サイトリンク】title=Hmmmmmmmmmmmm...? )〕 There are approximately equal percentages of male and female hearers.〔〔(【引用サイトリンク】title=The Phenomenon of Low Frequency Hums )〕 Age does appear to be a factor, with middle aged people being more likely to hear it.〔 In 2006 Tom Moir of the Massey University in Auckland, New Zealand, believes he has made several recordings of the Auckland Hum.〔(【引用サイトリンク】title=Auckland North Shore Hum )〕 His previous research using simulated sounds had indicated that the hum was around 56 hertz.〔(【引用サイトリンク】title=Mysterious humming driving Aucklanders 'bonkers' )〕 The Taos Hum was between 32 to 80 hertz.〔 Among those who cannot hear the hum and some specialists, there has been skepticism about whether it exists. In 2009, the head of audiology at Addenbrooke's Hospital in Cambridge, David Baguley, said he believed people's problems with hum were based on the physical world about one-third of the time, and stemmed from people focusing too keenly on innocuous background sounds the other two-thirds of the time. His current research focuses on using psychology and relaxation techniques to minimise the distress, which leads to a quieting or even removal of the noise. Geoff Leventhall, a noise and vibration expert, has suggested cognitive behavioral therapy may be effective in helping those affected. "It's a question of whether you tense up to the noise or are relaxed about it. The CBT was shown to work, by helping people to take a different attitude to it." 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「The Hum」の詳細全文を読む スポンサード リンク
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