Space Phone

 

Code Number: 3B25.67

Demo Title: Culvert Whistlers

Condition: Excellent

Principle: Culvert Whistlers

Area of Study: Oscillations & Acoustics, Astronomy

Equipment: 

Space Phone or Slinky.

Procedure:

See also: 3B25.67 in Astronomy and 8A70.70 in Astronomy.

The "Space Phone" allows you to hear whistlers as the speed of sound transmission through the spring is wavelength dependant.  A long Slinky can also be used for this demonstration.

References:

  • Regis Barille, "Frequency vs. Time Representation of a Signal With a Smartphone and a Slide Whistle", TPT, Vol. 62, #6, Sept. 2024, p. 459.
  • C. L. Adler, K. Mita, and D. Phipps, "Quantitative Measurement of Acoustic Whistlers", AJP, Vol. 66, #7, July 1998, p. 607.
  • Frank S. Crawford, "Pulse Compression: Dechirping of Time-Reversed Slinky Whistlers", AJP, Vol. 59, #11, Nov. 1991, p. 1050.
  • Elizabeth A. Essex, "Comment on 'Culvert Whistlers Revisited' by F. S. Crawford [Am. J. Phys. 56, 752-754 (1988)]", AJP. Vol. 59, #2, Feb. 1991, p. 181.
  • Frank S. Crawford, "Culvert Whistlers Revisited", AJP, Vol. 56, # 8, Aug. 1988, p. 752. 
  • Frank S. Crawford, "Erratum : "Slinky Whistlers", AJP, Vol. 55, # 10, Oct. 1987, p. 952
  • Frank S. Crawford, "Slinky Whistlers", AJP, Vol. 55, # 2, Feb. 1987, p. 130.
  • S. C. Bloch, "Introduction to Chirp Concepts with a Cheap Chirp Radar", AJP, Vol. 41, #7, July 1973, p. 857.
  • Phillip M. Rinard, "Rayleigh, Echoes, Chirps, and Culverts", AJP,  Vol. 40, #6, June 1972, p. 923.
  • Frank S. Crawford, "Culvert Whistlers", AJP, Vol. 39, #6, June 1971, p. 610.
  • "160, Slinky Sound Off!",  Christopher P. Jargodzki and Franklin Potter,  Mad About Physics, p. 60, 204.
  • Jearl Walker, "3.77, Culvert Whistlers", The Flying Circus of Physics, p. 176.
  • Jearl Walker, "3.78, Slinky Whistlers", The Flying Circus of Physics, p. 176.
Whistlers - Geomagnetosphere Activity