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3B25.55 - Spring Horn Toy - Space Phone

Code Number: 3B25.55
Demo Title: Spring Horn Toy - Space Phone
Condition: Excellent
Principle: Dispersion
Area of Study: Oscillations & Acoustics
Equipment:
Space Horn Toy
Procedure:
Dispersion of sound ( whistlers) as it travels through the spring may be observed using a microphone and the MatLab program. Just tap the end of the spring or strike it on a table edge when ready.
References:
- Kim Ludwig-Petsch, Michael Hirth, Jochen Kuhn, "The Sound of a Laser Blaster: Acoustic Dispersion in Metal Springs Analyzed with Mobile Devices and Open-Source PC Audio Software", TPT, Vol. 60, #1, Jan. 2022, p. 28.
- Roset Khosropour, Rawling Lamberton, Scott Paulinsky, "SpacePhone: Propagating Interest in Waves", TPT, Vol. 31, # 9, Dec. 1993, p. 529.
- Pat Murphy, Ellen Macaulay, and the staff of the Exploratorium, "Carnaval", Exploratopia, p. 218.
- Sara Stein, "Noisemakers - Pig Grunter", The Science Book, p. 182.