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Beats *

Difficulty
Time Required Long (2-4 weeks)
*Note: This is an abbreviated Project Idea, without notes to start your background research, a specific list of materials, or a procedure for how to do the experiment. You can identify abbreviated Project Ideas by the asterisk at the end of the title. If you want a Project Idea with full instructions, please pick one without an asterisk.

Abstract

Beats are a pattern of oscillating sound intensity (i.e., the volume of the pattern grows and fades with a regular cycle). They occur when two tones of almost equal frequency interfere. People can perceive beat frequencies below about 7 Hz. Figure out how to create sound files to play pure tones on your computer. Create files with a pure tone of one frequency in the left channel, and a pure tone of a different frequency in the right channel. Systematically explore different frequency combinations. What frequency combinations result in beats? Use a second computer (or digital recording device), to record the sounds of the left speaker alone, the right speaker alone, and both speakers together. Use sound editing software to examine and analyze the recorded files.

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MLA Style

Science Buddies Staff. "Beats" Science Buddies. Science Buddies, 6 Oct. 2014. Web. 28 Nov. 2014 <http://www.sciencebuddies.org/science-fair-projects/project_ideas/Music_p001.shtml>

APA Style

Science Buddies Staff. (2014, October 6). Beats. Retrieved November 28, 2014 from http://www.sciencebuddies.org/science-fair-projects/project_ideas/Music_p001.shtml

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Last edit date: 2014-10-06

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