Hi Openmoko list :) Cool idea :) As already mentioned you won't get a real validated measurement system, but it should be fun enough :)
I would suggest using a http://en.wikipedia.org/wiki/Maximum_length_sequence (MLS) instead of a sweep or alike. As its spectrum is flat you will hear only a white noise like sound. From the measured impulse response we can then get the direct speaker-microphone path and the distances to the reflecting surfaces as Rusty explained. Once I got my freerunner (should have arrived at pulster.eu last friday and any day at my doorstep :) ) I will test the speaker/mic quality. If someone needs a MLS of length 2^n just let me know and I can mail the sequence. :) stefan _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
