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absorptions

A blog about signals, programming, music, and other stuff.

  • By Oona Räisänen
  • Based in Finland
  • Roughly two posts per year
  • First post on

Posts per year

Data for this chart is available in the table below
Posts per year
Year starting Posts
2014 1
2015 6
2016 2
2017 5
2018 0
2019 2
2020 1
2021 2
2022 0
2023 1
2024 2

Any gaps could be due to errors when fetching the blog’s feed.

Most recent posts

Ultrasonic investigations in shopping centres
I can't remember how I first came across these near-ultrasonic 'beacons' ubiquitous in PA systems. I might have been scrolling through the audio spectrum while waiting for the underground train; or it might have been …
On , by Oona Räisänen, 962 words
Smoother sailing: Studying audio imperfections in Steamboat Willie
Steamboat Willie (1928) was one of the earliest cartoons with synchronized sound. That is, it had post-production sound effects; this was something new and exciting. Now that the cartoon has recently entered the public domain[bbc24] …
On , by Oona Räisänen, 1,799 words
Using HDMI EMI for fast wireless data transfer
This story, too, begins with noise. I was browsing the radio waves with a software radio, looking for mysteries to accompany my ginger tea. I had started to notice a wide-band spiky signal on a …
On , by Oona Räisänen, 1,826 words