Dear Colleagues,
I have improved the zero-crossing frequency analysis program available at:
<a href="http://www.holycross.edu/departments/biology/kprestwi/ZC/";
rel="nofollow">http://www.holycross.edu/departments/biology/kprestwi/ZC/</A>
A general description is given below, more details are available from the
"user's
manual" available at the download site as pdf.
Please note that the executable version of this program is for Power Macintosh
computers only. However, anyone who owns National Instruments' LabView 5 (or
later)
development system can download the entire library of files necessary to run
(or
modify the program).
Description: This program operates on digitized waveforms inputted as a
tab-delimited
text file. It will not control A/D conversions of an audio signal -- that must
be done
in another program such as Cornell Bioacoustics Lab's Canary. The reason for
this is
that I use the program to analyze insect (usually cricket) calls and I wish to
analyze
a small subset of the (perhaps 100 or more) sound pulses produced per second.
When you start the program, it prompts you for the waveform file and then
produces
displays of the waveform, cycle by cycle frequencies for the entire inputted
file and
only for values associated with waves of an amplitude above a user-defined
threshold,
and finally it gives a plot of power vs. cycle number. Normally, these
displays are
not printed. Instead, all data are saved to a text file which can then be
further
analyzed and/or graphed using a spreadsheet based analysis program.
Ken Prestwich
KN Prestwich
Associate Professor
Dept. Biology -- Holy Cross College
Worcester, MA 01610 USA
(508) 793-2578
<a
href="http://www.holycross.edu/departments/biology/website/biofaculty/bear.html";
rel="nofollow">http://www.holycross.edu/departments/biology/website/biofaculty/bear.html</A>
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