Embedded Files
STEM Club has the equipment to capture spoken words and show voice on an oscilloscope.
Microphone
Mixer, which gives amplification
Digital oscilloscope with run/stop and sweep magnification to see individual sound waves
USB memory to get recordings to a computer, for printing
Mississippi. The left third is "Mis," and the sibilance of the "s" is the high-frequency, dense, at 25% from the left. From 33% to 47% is the "missISSippi" part. From 47% to 58% is "mississIppi." The big, positive spike at 60% is the explosive P, which is followed by an EEE sound that trails off.
If a person said, "platypus," there would be a spike for each P.
Sing "aaaaeeeeooooaaaa," starting at low pitch, going to high pitch, then returning to low pitch. Zoom on the beginning and see 125Hz.
Zoom on the middle and see 273Hz.
We are able to have each student capture some words, save onto USB memory, and the next Saturday Mr. John can bring back printouts of voices.
If you look at your voice enough, and compare to the voices of other people, you see that computer recognition of words is a complicated thing.
Page updated
Google Sites
Report abuse