You've, no doubt, heard of White Noise and, maybe, Pink noise. But do you know what they sound like? How about brown or purple noise? No? Head over to Wikipedia for brief descriptions and audio snippits demonstrating the different colors of noise.

• Colors of Noise
• Soundmasker : White Noise Generator 3.0
• UC Berkley Noise Generator (WIN)
  
• Pink Noise Generator (OSX)
  
• Hardware Noise Generators
  
• Ogg codec

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