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Oona Räisänen (windytan)
Lives in Helsinki
6,157 followers|11,158,965 views
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begin aquajogging season.
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Justin Kelly's profile photo
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who here knows of WSPR? the weak signal mode?
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Ever wondered what a maritime VSAT is doing under its radome?
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Incredible stabilization!
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Doodling in Inkscape to redesign the buffers & windowing in slowrx... among everything else
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Ken Bellows's profile photoOona Räisänen (windytan)'s profile photoWorratep Suchon (DROIDVENGERS)'s profile photoJulius Friedman's profile photo
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It's a convolution, in this case duplicated the Inkscape object, sent it to back and applied Gaussian blur.
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Running my #gtkmm app on OSX. No problems at all. But XQuartz isn't running. o_O
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Ola mana 
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Case study: tinnitus with distortion
A periodically appearing low-frequency tinnitus is one of my least favorite signals. A doctor's visit only resulted in a WONTFIX and the audiogram on the right, which didn't really answer any questions. Also, the sound comes with some pecularities that warr...
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I listened to a science podcast lately where they were talking about tinnitus experiments on rats. Basically they had trained rats to do something when they heard a similar sound. They showed how the rats were showing the same reaction as hearing a tinnitus even when the nerve connection to their ears were cut off. So it could be a result of the brain "amplifying" the signal when it's soft and therefore creating some sort of hum.
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Inspired by David Galloway's "Square Wave from the summation of odd-integer harmonic frequencies", I made a spin-off based on the same code:

http://www.khanacademy.org/computer-programming/spin-off-of-david-galloways-square-wave-from-the-summation-of-odd-integer-harmonic-frequencies/5154727290208256

This version provides an alternative solution that "completes the square" (so to speak), by alternating the phases and directions of the waves, in such a way that the projection on the other (real/imaginary) axis is also a square wave.

Thanks David Galloway for sharing your code.

Original program:

https://www.khanacademy.org/computer-programming/square-wave-from-the-summation-of-odd-integer-harmonic-frequencies/5389081424166912
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Now I finally understand!
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Have her in circles
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Some more GUI art for an older blog post. #Inkscape  
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+Antti Brax
No worries, it's non-functioning.
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I recorded a soundscape on Helsinki metro. (Tascam DR05, internal mics, low cut filter disabled). Gotta love the VFD motors <3
windytan
Traveling on Helsinki metro by windytan
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Joel Gil's profile photoOona Räisänen (windytan)'s profile photoJack Strahan (Longshiren)'s profile photoDec Kelly's profile photo
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I'll try the same in Tokyo when I go back later this year.  Again, thanks.
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Also, there's an official Absorptions fan page on the mainstream social site.
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Oona Räisänen (windytan)'s profile photoDec Kelly's profile photoPeter Barrett's profile photo
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+Dec Kelly I don't really know, or care. I have never had a FB account and see no reason to get one.
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sound card + random parts. #DIY #teinitsejasäästin
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Have her in circles
6,157 people
ROMINA BEN's profile photo
Kalle Viiri's profile photo
Nhatbaoduy Nguyen's profile photo
mehmet kundakci's profile photo
Peter Pham's profile photo
Pierre-Luc LEPAGE's profile photo
Kaveendra Kumar's profile photo
Laurent BOBIN's profile photo
oon lungkam's profile photo
Communities
5 communities
Basic Information
Gender
Female
Story
Tagline
Signals & electronics hacker.
Introduction

A self-taught signals hacker from Helsinki, Finland. CCC and 44CON speaker. Studies computers. Fond of electronics, mysteries, codes and ciphers, and vintage tech.

Absorptions is a blog about my hobbies.

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Currently
Helsinki