Quote:
Originally Posted by baramedia
hello,
i wanna find a way to calculate the wind speed when using an iphone app.
so, i try to use the micro device to do it
apple give us an example, using micro device, to make a graph showing the voice volume on the mic ( https://developer.apple.com/library/...ion/Intro.html)
how can i calculate the speed of wind using the micro ?
thank you |
I doubt if you can calculate wind speed from microphone volume level with an accuracy at all. The results might not be linear, and would vary a lot based on the orientation of the microphone to the wind. Phone cases would also have a huge impact on the results, as would the exact position of the user's hand, etc, etc. It would also be greatly affected by ambient noise level.
Different phone models probably have different placement/enclosure of their microphones, which would affect your readings.
You are probably going to have to do your own research. The most meaningful way to do this would be to rent some time in a wind tunnel, and measure input volume for a variety of wind speeds, ranging from 0 (still air) up to 100 kph or so, with the microphone positioned at the top of the device. You could then create a linearization table for volume level to wind-speed.
Your results might be about as meaningful as the
correlation between pirates and global warming, however.
calculate wind speed with micro device
Linear Mode
