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Enhance your DSP Course with These Interesting Projects

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2012 ASEE Annual Conference & Exposition


San Antonio, Texas

Publication Date

June 10, 2012

Start Date

June 10, 2012

End Date

June 13, 2012



Conference Session

Projects in ECE

Tagged Division

Electrical and Computer

Page Count


Page Numbers

25.566.1 - 25.566.15



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Paper Authors


Joseph P. Hoffbeck University of Portland

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Joseph P. Hoffbeck is an Associate Professor of electrical engineering at the University of Portland in Portland, Ore. He has a Ph.D. from Purdue University, West Lafayette, Ind. He previously worked with digital cell phone systems at Lucent Technologies (formerly AT&T Bell Labs) in Whippany, N.J. His technical interests include communication systems, digital signal processing, and remote sensing.

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Enhance your DSP Course with these Interesting ProjectsStudents are often more interested learning technical material if they can see useful applicationsfor it. This paper presents four simple, yet interesting projects that can be used to motivatestudents to learn basic concepts in digital signal processing courses. Two of the projects arebased on the Fast Fourier Transform (FFT). The first is a simple, but effective voice recognitionsystem that determines if an audio recording contains “yes” or “no”, and the second is a programto recognize dual-tone multi-frequency (DTMF) signals. In order to demonstrate filters, thestudents can design filters to eliminate noise from audio recordings. A recording of birdschirping while a jet passes overhead can be used to demonstrate the utility of a high pass filter.When students design a filter to eliminate the background noise and listen to the output of thefilter, they are often amazed at how well the filter can remove the background noise and producea high quality recording. Similarly, a recording of an owl with a truck backup beeper in thebackground can be used to demonstrate a high pass filter. These projects can be implemented inalmost any computer language or DSP environment, and the recordings for these projects areavailable for free from the author.

Hoffbeck, J. P. (2012, June), Enhance your DSP Course with These Interesting Projects Paper presented at 2012 ASEE Annual Conference & Exposition, San Antonio, Texas. 10.18260/1-2--21323

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