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High Quality White Noise Gen

Discussion in 'Electronic Design' started by Jim Slone, May 31, 2010.

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  1. Jim Slone

    Jim Slone Guest

    What are the best options for high quality audio white noise
    generation?

    I have been using generic diodes and reversed biased transistors. Then
    someone mentioned there are special parts available with better
    characteristics.

    Can anyone please give me a pointer?

    Jim Slone
     
  2. E

    E Guest

    You can buy a CD full of white noise.

    -ek
     
  3. (c)Rap
     
  4. Guest

    Ow!
     
  5. A link previously mentioned in this thread offered what they said
    was "pink noise", along with "white noise" and "brown/red noise" IIRC.

    I do get a little into a mood to test the "pink noise" to see if it is
    "truly pink" as opposed to something towards "purple noise"... I hope
    only as a result of some midrange frequency response dip in my computer
    loudspeakers ("they are fairly-el-cheapo" that *may* accentuate "lower
    treble" and "bass end of midrange").
     
  6. A pseudo random noise (PRN) generator (a shift register and a few XOR
    gates in the feedback path) will generate quite good white noise
    sequences at frequencies well below the clock frequency.
     
  7. JosephKK

    JosephKK Guest

    Actually differencing them in twos, then summing seems more likely to
    reduce the asymmetry.
     
  8. JosephKK

    JosephKK Guest

    And that is where you tripped yourself up. Sums of lopsided signals are
    still lopsided. Differences may work better.
    Direct from the nature of the I-V curve.
     
  9. oo pere oo

    oo pere oo Guest

    Thanks! Now I have real news again :)

    Pere
     
  10. JosephKK

    JosephKK Guest

    There is also eternal-september.org. Plus a few low cost commercial
    providers, like where i post from.
     
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