For a long time now I have been meaning to try out a method of acoustic detection with a Ping Pong (Table Tennis) Table.
I saw a demo at Casa Paganini in 2006 (is this the Tai Chi project?).
I have 4 piezo transducers linked up to Eyesweb through my sound card sampling at 96KHZ.
When the threshold of one rises above a certain level I take a timestamp.
In this way I can estimate position using Time Difference On Arrival.
My results seem very unpredictable though. Sometimes accurate, other times meaningless.
Is there anyone who has used this method who could give me some tips?
Am I wasting my time in the quest for (vaguely) reliable results?
Should I try to develop an interrupt based system?
Thanks,
Gavin
http://www.digitalfunfair.co.uk