by rubatuga on 5/13/17, 5:51 PM
Running it through a FFT, the noise looks similar to blue noise, but with a lowpass at 1000 Hz
by failrate on 5/13/17, 5:25 PM
Unfortunately, the audio clips do not play in Safari mobile.
by tscs37 on 5/13/17, 8:31 PM
This sound kind of reminds me of one of these "Space Engine Sounds" on youtube, especially the Firefly/Serenity themed track.
I used to love it for sleeping, it's rather relaxing.
by Kenji on 5/13/17, 6:13 PM
My initial reaction was like "Oh, like white noise!"
I could not have been more wrong. There is very clear structure in Perlin Noise. Great write-up and I learned something.
by andai on 5/13/17, 6:02 PM
I've heard this before! In some Nine Inch Nails tracks. I always thought it was white noise + bandpass + clipping or distortion.
by hammock on 5/13/17, 7:16 PM
Didn't really understand how he got to it, but would be interesting to hear this noise source across the larger spectrum (not just the low freqs)
It might sound/be more natural/fractal than pure white noise (+LPF), I can't tell. But it won't work to drown out office chatter because its the high freqs there that matter.
by slaymaker1907 on 5/13/17, 10:04 PM
It might be interesting to use Perlin noise to craft a melody by mapping the reals onto a musical scale.
In particular, it seems like it would have some nice properties for melodies since it will keep the melody in a comfortable range and won't throw in a bunch of large leaps.
by blue1 on 5/13/17, 6:10 PM
To me it sounds like the ships background noise in Star Trek.
by joshu on 5/14/17, 2:20 AM
Does this use Perlin noise to generate the PCM values?
If so, what would it look like to use Perlin noise as the input to an inverse FFT function?
by martyvis on 5/13/17, 10:09 PM
LOL. I just finished putting up a pergola with a clear polycarbonate roof. The recommendation is to apply a foam adhesive tape to the purlins (battens) to prevent noise caused by movement of the sheets from thermal expansion. I
https://www.bunnings.com.au/suntuf-access-25mm-x-20m-purlin-... - I thought it was a strange topic for HN ;-)