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Sound Wave Applet
https://www.grc.nasa.gov/WWW/k-12/airplane/sndwave.html
Notice how the frequency of the sound changes when the source is moving and notice how the waves collect into a Mach wave when the object moves faster than Mach 1.0, the speed of sound. Here are some of the interesting physics …
Sound Wave Interference Applet - Falstad
https://www.falstad.com/interference/
This java applet demonstrates interference between two sources of sound waves. You need two speakers (or one speaker and a wall) and a sound card (preferably stereo).. Measure or estimate the distance between your speakers and set the Speaker Separation slider accordingly. (Uncheck the Metric Units checkbox if you want.) Then turn on the Sound checkbox. . The applet will play …
The vOICe Interactive Soundscape Applet ♫ Draw your own Sound!
https://www.seeingwithsound.com/javoice.htm
and observe that the spectral analysis result indeed resembles the arti2.gif image, even though the default applet frequency interval is now [500 Hz, 4kHz] instead of the [500 Hz, 5kHz] range used in generating the sound file with the simple arti2.c ANSI C program!
Sound Wave Interference Applet
https://psrc.aapt.org/items/detail.cfm?ID=1579
This applet is a visual simulation of sound interference between two speakers. The applet can also be used to generate interference with sound from stereo speakers. The controls allow speaker separation, playing frequency, phase difference and scale and balance to be adjusted. Source code and directions in English and German are also included.
The Soundry: Interactive Sound Lab
https://www.schoolnet.org.za/PILAfrica/en/webs/19537/java/beats.html
Here are step by step instructions for using the Beats Applet: Choose a frequency level (between 437 and 443 Hz) for Frequency #1. Choose a different level for Frequency #2. Click the "Hear It" button underneath the bottom box by "Combined Wave" and listen for the beats. You should hear a "wah-wah" sound -- that's the beat.
Sound - PhET
https://phet.colorado.edu/en/simulation/sound
This simulation lets you see sound waves. Adjust the frequency or volume and you can see and hear how the wave changes. Move the listener around and hear what she hears.
Spectrum Analyzer | Academo.org - Free, interactive ...
https://academo.org/demos/spectrum-analyzer/
The frequency spectrum is generated by applying a Fourier transform to the time-domain signal. The demo above allows you to select a number of preset audio files, such as whale/dolphin clicks, police sirens, bird songs, whistling, musical instruments and even an old 56k dial-up modem.
Online Tone Generator - Free, Simple and Easy to Use.
https://onlinetonegenerator.com/
Free, Simple and Easy to Use. Simply enter your desired frequency and press play. You will hear a pure tone sine wave sampled at a rate of 44.1kHz. The tone will continue until the stop button is pushed. The tone generator can play four different waveforms: Sine, Square, Sawtooth and Triangle. Click on the buttons to select which waveform you ...
Sound Waves - Complete Toolkit - Physics Classroom
https://www.physicsclassroom.com/Teacher-Toolkits/Sound-Waves/Sound-Waves-Complete-ToolKit
The Nature of Sound - Complete Toolkit Objectives. To describe sound as a longitudinal, mechanical, pressure wave that is produced by a vibrating object. To understand the concept of frequency as the number of back-and-forth oscillations of a particle about its resting position and to relate the frequency of sound to the pitch.
Fowler's Physics Applets
http://galileoandeinstein.physics.virginia.edu/more_stuff/Applets/home.html
Visualizing a Sound Wave. A traveling sound wave carries energy, but this applet shows there is no net movement of the air, despite appearances. Reflection of a Wave Pulse at a Boundary. Inverted for a fixed end, not for a free end: this can be understood by watching two pulses collide. Wave Pulse Encounters a Different Medium
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