White noise, like white light, consists of all frequencies combined togetherĪ useful analogy is that of white light, which as we all know from school, contains all the colours (frequencies) combined together. In technical terms white noise can be described as noise whose amplitude is constant throughout the audible frequency range. When used to promote healthy sleep, white noise helps to drown out sounds which might otherwise prevent you from either falling asleep or waking up whilst asleep. In simple terms, white noise is a special type of sound signal which is used to mask background sounds.
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