Code Number: 3C50.10
Demo Title: Fourier Synthesis of Waves - Pasco
Condition: Good
Principle: Fourier Synthesis
Area of Study: Oscillations & Acoustics
Equipment:
Tektronics 2235 Oscilloscopes (2), PA amplifier, Preamp Mike Mixer (2-Channel), Microphone, Fourier Synthesizer (Pasco), and Speaker.
Procedure:
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.
References:
- Michael J. Ruiz and Lowell Hobbs, "Inharmonic Spectra with a Rock Guitar Effects Pedal", TPT, Vol. 56, #8, Nov. 2018, p. 504.
- Michael C. LoPresto, "Fourier Analysis of Musical Intervals", TPT, Vol. 46, #8, Nov. 2008, p. 486.
- Elisha Huggins, "Fourier Analysis in Introductory Physics", TPT, Vol. 45, #1, Jan. 2007, p. 26.
- Thomas B. Greenslade, Jr., "Ultrasonic Transducers for Fourier Analysis", TPT, Vol. 33, #8, Nov. 1995, p. 514.
- "An Anharmonic Correction", TPT, Vol. 32, #1, Jan. 1994, p. 5.
- "The Season of Harmonics", TPT, Vol. 31, #9, Dec. 1993, p. 544.
- Geoffrey Whaite and Joe Wolfe, "Harmonic or Fourier Synthesis in the Teaching Laboratory", AJP, Vol. 58, #5, May 1990, p. 481.
- Phillip W. Gronseth, Philip A. Johnson, and Russell K. Hobbie, "A New Fourier Analysis Demonstration", AJP, Vol. 53, #11, Nov. 1985, p. 1112.
- R. K. Lambert and R. C. O'Driscoll, "Fourier Series Experiment for the Undergraduate Physics Laboratory", AJP, Vol. 53, #9, Sept. 1985, p. 874.
- 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.
- W. Bolton, "Fourier Analysis", Book 2 - Waves and Particles, Physics Experiments and Projects, 1968, p. 68.