Noise Generator allows you to play “white noise” to help block out other sounds and aid with concentration. This is for people who do not actually enjoy nature sounds. “White noise” is the most effective at blocking distractions because it contains sound across all sound frequencies. You simply choose the color that correlates to a specific type of noise. So, if sound does help you relax, but sounds of water or musical notes do not, take a look at Noise Generator.
Noise Generator offers three types of noise: white, pink and Brownian (also known as brown noise or red noise). The color of noise refers to the power spectrum of a noise signal.
White noise has a flat frequency spectrum. The name is derived from white light, which is what the human eye sees when all the colors that make up the visible light spectrum are combined. Blend a red, green, and blue light together and you'll get white light. In the same way, white noise has equal energy at all sound frequencies to which humans are sensitive. Other sounds will get masked by white noise so they become less detectable. White Noise sounds similar to static of an analog TV or radio station that has stopped broadcasting.
Pink noise has a spectrum inversely proportional to its frequency. Our ears process frequencies logarithmically, and pink noise takes this into account. In terms of ambient noise, pink noise sounds much nicer than white noise, which is too harsh in the upper frequencies.
Brownian noise, also known as brown noise or red noise, has a spectrum inversely proportional to the square of its frequency. Brown noise has a damped or soft quality when compared to white or pink noise. It sounds like being real close to a waterfall or being in heavy rain. "Brown" noise is not named for a power spectrum that suggests the colour brown; rather, the name derives from Brownian motion. "Red noise" describes the shape of the power spectrum, with pink being between red and white.
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