Right, it takes two phones. You start playing sound on one and throw it out the car window, then measure the Doppler effect with the other.
Great thing is, you can get a speed reading on the way back, if you pass by the same place. -- Kostya 2011/1/13 Hogus <[email protected]> > Don't be ridiculous, you can't use doppler shift if the source and > recorder remain at the same position relative to each other. > > On Jan 13, 5:56 am, Spiral123 <[email protected]> wrote: > > Play a tone and record it at the same time. The doppler shift should > > give you the speed. Works for galaxies. > > > > On Jan 12, 9:52 pm, metal mikey <[email protected]> wrote: > > > > > > > > > > > > > > > > > You could use the phone's camera to take video of the car's > > > speedometer and use image analysis to determine what the speedometer > > > indicates the speed as. LOL :D > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
