3C50.10 - Fourier Synthesis of Waves - Pasco

Code Number:
Demo Title:
Fourier Synthesis of Waves - Pasco
Fourier Synthesis
Area of Study:
Oscillations & Acoustics
Tektronics 2235 Oscilloscopes (2), PA amplifier, Preamp Mike Mixer (2-Channel), Microphone, Fourier Synthesizer (Pasco), and Speaker.

With the Fourier Synthesizer the addition of harmonic waveforms may be shown on the oscilloscope. The signal may also be run simultaneously to a speaker to hear the additions.

A microphone connected to the oscilloscope can then show that the human voice waveform looks similar to the waveform produced with the harmonic addition.

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  • Elisha Huggins, "Fourier Analysis in Introductory Physics", TPT, Vol. 45, #1, Jan. 2007, p. 26. 
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  • Sk-3: Freier and Anderson, A Demonstration Handbook for Physics.
  • W-075: "Fourier Synthesizer and Scope", DICK and RAE Physics Demo Notebook.
  • Yaakov Kraftmakher, "3.5, Spectra of Electrical Signals", Experiments and Demonstrations in Physics, ISBN 981-256-602-3, p. 177.
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Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.