| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 3C50.00 | Wave Analysis and Synthesis | | |
| 3C50.10 | Pasco Fourier synthesizer | PIRA 200 | The Pasco Fourier synthesizer allows one to build an arbitrary waveform with up to nine harmonics. |
| 3C50.10 | Pasco Fourier synthesizer | 3C50.10 | The Pasco Fourier synthesizer is used to build up a square wave. |
| 3C50.10 | Pasco Fourier synthesizer | Sk-3 | The Pasco Fourier synthesizer allows one to build an arbitrary waveform out of up to nine harmonics. |
| 3C50.10 | Fourier synthesizer | Disc 10-15 | Use the Pasco Fourier synthesizer to demonstrate building square and triangle waves. |
| 3C50.12 | electronic music synthesizer | AJP 43(9),755 | The principles of an electronic music synthesizer and its use in demonstrations. |
| 3C50.12 | electric organ as synthesizer | AJP 29(6),372 | The timbre of a musical note is demonstrated by showing an oscilloscope trace of an electric organ while changing the drawbars. |
| 3C50.13 | electromechanical Fourier synthesize | AJP 40(7),937 | A set of eight mechanically geared potentiometers generate sine/cosine waves and harmonics. |
| 3C50.13 | mechanical multichannel generator | 18-4.4 | A four channel mechanical signal generator is used to show a fundamental and two harmonics. Picture. Construction details in appendix, p. 626. |
| 3C50.14 | synthesizer | AJP 43(10),899 | The PAiA 2720 Synthesizer used with an oscilloscope for ten demonstrations. |
| 3C50.14 | waveform synthesizer | AJP 42(9),754 | Oscillators tuned to 1, 2, 3, 4, and 5 Khz have variable amplitude and phase. External input and an audio amp are also included. |
| 3C50.14 | waveform synthesizer | AJP 53(9),874 | A waveform synthesizer based on the Intel 8748 microcontroller is described along with some theory and an experiment. |
| 3C50.15 | mechanical square wave generator | PIRA 1000 | |
| 3C50.15 | mechanical square wave generator | 3C50.15 | Shadow project a mechanism with a small disc mounted at the edge of a larger disc with 1/3 the diameter geared to rotate 3 times as fast as the larger disc. |
| 3C50.18 | arbitrary waveform generator | 33-2.9 | Sweep a high freq signal at a low freq on an oscilloscope with a mask cut out to the shape of the wave desired and look at it with a photocell. |
| 3C50.30 | Helmholtz resonators and microphone | PIRA 200 | Hold a small microphone individually to a set of Helmholtz resonators. |
| 3C50.30 | Helmholtz resonators and microphone | 3C50.30 | |
| 3C50.31 | Helmholtz resonator | 19-4.6 | Sound from a loudspeaker is directed at a series of Helmholtz resonators with pinwheel detectors at their small apertures. |
| 3C50.31 | ganged resonance boxes | 19-4.8 | A pistol is fired in front of a set of tuning fork resonance boxes equipped with inductive pickups. Picture. |
| 3C50.33 | resonance in a box | 19-4.11 | A complex setup to plot the frequency spectrum of a box. Pictures, Diagrams. |
| 3C50.34 | resonant response of vocal cavities | S-117 | Use a fake larynx to talk without using the vocal cords. |
| 3C50.35 | resonance tube spectrum | PIRA 1000 | |
| 3C50.35 | resonance tube spectrum | 3C50.35 | Drive a speaker at one end of a tube with the swept frequency output of a spectrum analyzer. |
| 3C50.36 | air column resonance spectra | AJP 48(1),24 | Use a storage scope and two function generators to display the swept spectrum. Interesting additions are end corrections, tone holes, and adding a bell. |
| 3C50.37 | radiation patterns of horns | S-145 | Feed a oscillator or other sound to any one of four different types of horns to show differences in quality at various frequencies. |
| 3C50.40 | harmonic tones (vibrating string) | PIRA 1000 | |
| 3C50.40 | string resonance spectra on oscillo. | AJP 50(6),570 | Sweep the source generator and oscilloscope horizontal from a generator. Use a steel wire and guitar pickup. |
| 3C50.40 | resonances in strings | AJP 52(5),470 | Excite a steel string with a linearly swept sinusoidal signal and show the output on a spectrum analyzer or storage oscilloscope. |
| 3C50.50 | noise (pink and white) | PIRA 1000 | |
| 3C50.55 | distinguishing harmonics with the ear | PIRA 1000 | |
| 3C50.55 | distinguishing harmonics | 3C50.55 | A generator with an adjustable high Q bandpass filter allows one to train the ear to pick out the harmonics of a complex sound. |
| 3C50.55 | distinguishing harmonics | AJP 53(11),1112 | The circuit diagram for the Gronseth device. |
| 3C50.70 | wave analysis (PASCO filter) | PIRA 1000 | |
| 3C50.80 | spectrum analyzer | PIRA 1000 | |
| 3C50.81 | RLC bank harmonic analyzer | 33-3.7 | A bank of RLC circuits covering to the tenth harmonic of 235 Hz is used as a harmonic analyzer. Diagram. |
| 3C50.82 | LC harmonic analyzer | AJP 28(4),405 | Sweep a square wave generator through a single LC filter and detect maxima at harmonics of the fundamental. |
| 3C50.83 | low cost spectrum analyzer | AJP 45(1),103 | A circuit for a 100 kHz spectrum analyzer using a standard oscilloscope for display. |
| 3C50.83 | spectrum analyzer - Tek 5L4N | AJP 48(6),451 | The Tek 5L4N spectrum analyzer plug-in is used with a camera (instead of a storage scope) to show the spectrum of sustained tones from musical instruments at different pitch and loudness. |
| 3C50.94 | FFT on 6502 | AJP 52(8),713 | A FFT algorithm relocatable to any 6502 is available from the author. |
| 3C50.94 | microcomputer based analyzer | AJP 53(11),1107 | Discusses algorithms for cross correlation and sound intensity analysis. |