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Logo for Beats
In this applet two waves of equal amplitude are interfering. You can control the centre or nominal frequency of the waves and alsointroduce a small frequency difference between them. When you have set these two controls, click on the centre panel and thecomputer will draw out the wave.
Material Type: Simulation
Technical Format: Java Applet
Date Added to MERLOT: August 05, 2000
Date Modified in MERLOT: June 01, 2009
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Submitter: John Walkup


  • Reviewed by members of Editorial board for inclusion in MERLOT.
    Editor Review
    Very good quality; in queue to be peer reviewed
    avg: 5 rating
  • User review 3.5 average rating
  • User Rating: 3.5 user rating
  • Discussion (4 Comments)
  • Learning Exercises (none)
  • Personal Collections (none)
  • Accessibility Info (none)


Primary Audience: College General Ed
Mobile Compatibility: Not specified at this time
Language: English
Cost Involved: no
Source Code Available: no
Accessiblity Information Available: no
Creative Commons: unsure


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Discussion for Beats

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Avatar for Susan Phillips
5 years ago

Susan Phillips (Faculty)

This would be better with a time domain, so you could see that a 3 Hz difference in the two tones creates 3 beats per second.

Avatar for Traves O'Neill
6 years ago

Traves O'Neill (Faculty)

URL is no good

Technical Remarks:

URL is no good.

Avatar for Michael Magnuson
6 years ago

Michael Magnuson (Faculty)

Seems to have disappeared.

Avatar for TC Kida
14 years ago

TC Kida (Student)

Good display of the effects of interference and frequency differences and their
relevance to the real world (such as in tuning musical instruments). The
explanation is helpful, and
there are tips on what to watch while playing with the applet

Technical Remarks:

Needed to manually update changes to the frequencies of the waves, which is nice
in that it doesn't eat up memory like other applets.