white noise
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statichisssilencesoundfrequencyspectrumaudioacousticsdecibelamplitudewavelengthsignalinterferencemaskingbackgroundhumbuzzdroneresonanceoscillationpink noiserandomnessstochasticentropybandwidthhertzauditoryearhearingsleepinsomniaconcentrationfocusdistractioncalmrelaxationmeditationsoothetranquilityambientatmospheregeneratormachinespeakeramplifierfilterequalizerwavesine wavesquare wavesawtooth wavemodulationdistortionechoreverbsonicacousticvolumepitchtonetimbreconstantsteadyuniformmonotonouschaosphysicselectronicstelecommunicationsradiotelevisionstatic electricityinterference patternthresholdperceptionpsychoacoustics