Oct 04, 2018  White noise, on the other hand, is an electronically generated stimulus that covers all frequency bands at the same level of intensity. For this experiment, a 20-min “White noise” stimulus, at the same average amplitude as the “Traffic noise” stimulus (79.1 dBA), was generated using Audacity (Supplementary Material S4).

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See the seller's listing for full details.Brand:UnbrandedBattery capacity:1200mAhMPN:Does not applyCharging:about 1.5HInput:DC5V=0.8ASize:90.90.31 mmRated Power:1.5WWorking time:15-30HUPC:642.