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The big three in sleep sounds are white noise, brown noise, and pink noise, but there are many other noise types, including purple noise, gray noise, and even black noise (a.k.a. good ol ...
In science, Brownian noise, also known as Brown noise or red noise, is the type of signal noise produced by Brownian motion, hence its alternative name of random walk noise. The term "Brown noise" does not come from the color , but after Robert Brown , who documented the erratic motion for multiple types of inanimate particles in water.
[16] [17] That is, it is similar to pink noise, but with different spectral content and different relationships (i.e. 1/f for pink noise, while 1/f 2 for red noise, or a decrease of 6.02 dB per octave). In areas where terminology is used loosely, "red noise" may refer to any system where power density decreases with increasing frequency. [18]
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Infrasound arrays at monitoring station in Qaanaaq, Greenland.. Infrasound, sometimes referred to as low frequency sound or incorrectly subsonic (subsonic being a descriptor for "less than the speed of sound"), [1] describes sound waves with a frequency below the lower limit of human audibility (generally 20 Hz, as defined by the ANSI/ASA S1.1-2013 standard). [2]
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Brown sound may refer to: Brown noise or Brownian noise, a random signal; Brown note, a hypothetical sound wave that would cause involuntary defecation; Dave Baksh (born 1980), a guitarist known as "Brownsound" The Brown Noise, the final episode of the third season of South Park; Brown sound, a guitar sound style of Eddie Van Halen