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ERIC Number: EJ1117841
Record Type: Journal
Publication Date: 2016-Nov
Pages: 3
Abstractor: As Provided
ISSN: ISSN-0031-921X
Inexpensive Audio Activities: Earbud-Based Sound Experiments
Allen, Joshua; Boucher, Alex; Meggison, Dean; Hruby, Kate; Vesenka, James
Physics Teacher, v54 n8 p500-502 Nov 2016
Inexpensive alternatives to a number of classic introductory physics sound laboratories are presented including interference phenomena, resonance conditions, and frequency shifts. These can be created using earbuds, economical supplies such as Giant Pixie Stix® wrappers, and free software available for PCs and mobile devices. We describe two interference laboratories (beat frequency and two-speaker interference) and two resonance laboratories (quarter- and half-wavelength). Lastly, a Doppler laboratory using rotating earbuds is explained. The audio signal captured by all experiments is analyzed on free spectral analysis software and many of the experiments incorporate the unifying theme of measuring the speed of sound in air.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A