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November 2011

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The Open Source Physics Project is supported by NSF DUE-0442581.

Computer Program Detail Page

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Sound Waveforms JS Model
written by Wolfgang Christian
The Sound Waveforms JavaScript Model explores the aural texture of four basic periodic waveforms: sine, triangle, square, and sawtooth. The sine waveform has a single frequency and is the building block of other periodic waves by summing harmonics in a Fourier Series. The richness of the sound is called the timbre and is determined by the amplitude of the harmonics in the Fourier sum.  

The One-Dimensional Wave Function Superposition JavaScript Model was developed using the Easy Java Simulations (EJS) version 5.  It is distributed as a ready-to-run html page and requires only a browser with JavaScript support.
1 source code document is available
Subjects Levels Resource Types
Mathematical Tools
- Series and Functions
= Fourier Series
Oscillations & Waves
- Acoustics
= Pitch
= The Ear
= Wave Analysis and Synthesis
- General
- Sound Reproduction
- Wave Motion
= Compound Waves
- Lower Undergraduate
- High School
- Informal Education
- Upper Undergraduate
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Educators
- text/html
- application/zip
- application/javascript
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Access Rights:
Free access
This material is released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license.
Rights Holder:
Wolfgang Christian
Record Cloner:
Metadata instance created February 27, 2016 by Wolfgang Christian
Record Updated:
September 29, 2023 by Wolfgang Christian
Last Update
when Cataloged:
February 25, 2016

AAAS Benchmark Alignments (2008 Version)

4. The Physical Setting

4F. Motion
  • 6-8: 4F/M4. Vibrations in materials set up wavelike disturbances that spread away from the source. Sound and earthquake waves are examples. These and other waves move at different speeds in different materials.
  • 6-8: 4F/M7. Wave behavior can be described in terms of how fast the disturbance spreads, and in terms of the distance between successive peaks of the disturbance (the wavelength).
  • 9-12: 4F/H6ab. Waves can superpose on one another, bend around corners, reflect off surfaces, be absorbed by materials they enter, and change direction when entering a new material. All these effects vary with wavelength.
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian, Computer Program SOUND WAVEFORMS JS MODEL, Version 1.0 (2016), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368).
W. Christian, Computer Program SOUND WAVEFORMS JS MODEL, Version 1.0 (2016), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368>.
APA Format
Christian, W. (2016). Sound Waveforms JS Model (Version 1.0) [Computer software]. Retrieved July 18, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368
Chicago Format
Christian, Wolfgang. "Sound Waveforms JS Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368 (accessed 18 July 2024).
MLA Format
Christian, Wolfgang. Sound Waveforms JS Model. Vers. 1.0. Computer software. 2016. 18 July 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian", Title = {Sound Waveforms JS Model}, Month = {February}, Year = {2016} }
Refer Export Format

%A Wolfgang Christian %T Sound Waveforms JS Model %D February 25, 2016 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368 %O 1.0 %O text/html

EndNote Export Format

%0 Computer Program %A Christian, Wolfgang %D February 25, 2016 %T Sound Waveforms JS Model %7 1.0 %8 February 25, 2016 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=13986&DocID=4368

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Sound Waveforms JS Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

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