4 ms·
I used it to diagnose a funny noise on my car, by recording the ambient sound in the cabin with my phone - velcroed to the dashboard with its microphone pointin
by Gordonjcp 4y ago
I used it to diagnose a funny noise on my car, by recording the ambient sound in the cabin with my phone - velcroed to the dashboard with its microphone pointing down at the gearbox tunnel - and announcing my speed when the noise was particularly pronounced.
Then I used sox to extract loud but low frequencies, and since I could hear it correlated with road speed I was able to verify that it was a particular bearing in the front propshaft by working out the relationship of frequency and gear ratio.
All without crawling underneath and getting oily!
- 14 4y agoI would love to see a video of how exactly you did this. Nice work
- javawizard 4y agoThe amusing thing about that for me is that, as someone with perfect pitch, I've used the pitches made by failing components in my car for diagnostic purposes without even thinking about the fact that most people can't do that without technological help. It's just... you know what pitch it is and therefore how fast it's moving/rotating/oscillating. Everyone knows that about everything they hear. Right? Makes me wonder how many lived experiences I take for granted that are totally different for others, and likewise the lenses through which others see the world that I would never imagine.
- Gordonjcp 4y agoAs a musician, I'm glad I don't have "perfect pitch". It would be impossible to play with any other musicians!