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https://iqtainment.wordpress.com/acoustic-ruler/ https://iqtainment.wordpress.com/acoustic-ruler/ I've played with it - with some calibration, it seems to work

by ay 12y ago

https://iqtainment.wordpress.com/acoustic-ruler/ https://iqtainment.wordpress.com/acoustic-ruler/ I've played with it - with some calibration, it seems to work. But YMMV, and I got it mostly just in an appreciation of the author's clever idea.

graycat 12y ago
Fantastic! I was just guessing and didn't know someone had already done it! Thanks!