Acoustic Contactless Stopwatch Timers Get the time between two acoustic events. This experiment allows to measure the time between two loud acoustic signals. These can be clicks, beeps, claps etc. as long as they are louder than the environment. You might want to adjust the threshold, giving the level at which the stop watch is triggered (ranging from 0 to 1). After starting the experiment, the clock will start on the first noise exceeding the threshold and will be stopped on the second noise. To repeat the experiment, clear the data and start again. Make sure that the first noise is short as a long sound might be immediately detected as a stop. New: Two more claps clear the data and let you restart again. TIM red threshold mindelay recording rate i i2 t limit max last tlist dtlist tindex tcount tcount-1 t0 t1 t0effective t1effective tmax dt01 count index threshold mindelay dt01 recording count recording i max i index i2 i2 rate t max threshold t 0 t last tlist last last mindelay limit limit t t 0 t t 0 t tlist tlist dtlist 0 dtlist tlist tcount tcount 1 tcount-1 index count index index rate tmax tcount 3 tlist tcount 3 0 index t0 t1 0 1 tlist t0 1 1 tlist t1 t1 0 tmax t1 t1effective t0 0 tmax t0 t0effective t1effective t0effective dt01 tlist