I suggest you first try to create a simple sonar obstacle detector (distance detector), because spatial (i.e. lateral) resolution with the phone's loudspeaker will be miserable (audible sound so high diffraction, and no built-in cone for better audio directionality). If successful, you move from there. Just doing the real-time analysis of streaming recorded sound for possible echoes and their delays is already tricky, ensuring that any variable delay artifacts are not larger than the distance variations that you hope to detect (3 ms = 1 meter at speed of sound, or 0.5 meter uncertainty if thinking of the return path).
Good luck! The vOICe for Android http://www.seeingwithsound.com/android.htm On Oct 13, 10:38 am, mjrtom <[email protected]> wrote: > so i know that you most probably need some expensive equipment in > order to make a sonar, or anything that would imitate ecolocation. but > since we dont have that, and wont be getting it anytime soon, why not > create an application that would fake sonar. > > basically have the phone emit sonar bleeps, or bat-like clicks, and > then use the camera to record whatever is happening. but display it > the way daredevil sees.http://www.youtube.com/watch?v=EpOcO08dHvoat > 0:28. (i know it's a bad movie, but thats the only example i cant > think of right now). > > so when people want to show off their new app, they can say: > G1 DUDE: "look, my phone has sonar!" > *bleep (image shows up in black and white/green/blue, and then fades > away)* *bleep (image shows up in black and white/green/blue, and then > fades away)* > G1 DUDE'S FRIENDS: "whoa man you are so rad, i want to be just like > you." --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Discuss" 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-discuss?hl=en -~----------~----~----~----~------~----~------~--~---
