Discontinuities in stimulus.

[Ranjit Randhawa <rsran@xxxxxxxxxxx>]

Dear List,
I have a rather simple question concerning the usual assumption made 
about the need for "continuity" of a stimulus. My interest arose when I 
started exploring the "fluttering" sound heard for some stimuli. A 
simple way to create a stimulus to study this phenomenon was to insert 
periodic "discontinuities" in a pure sinusoid of low frequency by simply 
deleting bits from this stimulus in a consistent manner. My next step 
was to try and create a model, which became problematic as the resultant 
sound heard was dependent both on the size of the deleted section and 
also on where the deletion was performed. Does anyone have an easy 
method for determining first, that a discontinuity in the stimulus has 
occurred and second and more importantly, where.
Thanks in advance for any insights,
Randy Randhawa