Passing planes and other whoosh sounds(windytan.com)
171 points by zdw | 44 comments
windytan.com on Hacker News
4 stories on the front page, newest first. Scroll down to watch the site change over time.
Ultrasonic investigations in shopping centres(windytan.com)
332 points by GolDDranks | 131 comments
Blog post by Oona Räisänen investigating near-ultrasonic beacon tones emitted by PA systems in shopping centres, with spectrum analysis.
