EEL6586: Automatic Speech Processing HW#2
EEL 6586: HW#2
Assignment is due Friday, January 24, 2003 in class. Late home-
work loses e#of days late −1percentage points. See the current late
penalty at http://www.cnel.ufl.edu/hybrid/harris/latepoints.html
This assignment includes both matlab and textbook questions. You must
both hand in your homework AND email your two audio files as attachments
your files with your first initial and lastname with -a for part a and -b for part
b. So for example, my files would be called jharris-a.wav and jharris-b.wav
Use a subject line of “EEL6586 HW#2 your full name”, so for example my
subject line would be “EEL6586 HW#1 John Harris”
PART A: Recording a voiced phoneme
A1 Record yourself on a computer saying the phoneme /i/ for about 0.5
seconds. Remember the /i/ is the vowel sound in “me”. Make sure to
hold the microphone to the side of your mouth to reduce noise from
the airflow. Email in the sound file as described above. The preferred
format is an 8KHz .wav file. If you have no capability to record sound
on a PC and have no friends who can help, talk to the TA. The recording
must be your voice.
A2 Hand in a portion of the time domain plots for the phoneme showing a
few pitch periods. The axes of this plot (and all plots) should be clearly
labelled. Clearly indicate the pitch period and note its numerical value.
Also, list the pitch frequency.
A3 Plot the magnitude spectrum of the phoneme. Clearly indicate the
values of F1, F2and F3on the graphs. Also show the log magnitude
plot.
A4 Estimate the bandwidth and amplitude of each formant using whichever
definition you like. However, be sure to explain your calculation.
J.G. Harris January 13, 2003 1
