https://phet.colorado.edu/en/simulations/wave-on-a-string
Description: This online simulation allows you to explore the effect of frequency and amplitude on a wave.
Suggested uses:
Explore the basics of how sound travels
Lesson plans:
How do sound waves work? (suggested for third or fourth grade)
Artificial Intelligence and Wave on a String: This simulation applies the laws of physics to demonstrate how a wave moves.
Background: The Wave on a String simulation was created as part of the PhET (Physics Education Technology) Interactive Simulations project at the University of Colorado Boulder. The project aims to provide flexible simulations for students to experience science concepts in an interactive way.