Why the percussion of a spring produces the same sound of “blaster pistols” in the movie Star Wars?

Authors

  • Jair Lúcio Prados Ribeiro Colégio Marista de Brasília

DOI:

https://doi.org/10.5007/2175-7941.2014v31n2p385

Abstract

When a stretched metal spring is hit sideways, a whistler is produced. The whistler is a sound effect that has become part of today's culture due to its popularity as the sound of a "laser gun" in the movie Star Wars. The whistler occurs due to sound dispersion in the metal, but the revision of High School textbooks and University education shows that a discussion of this phenomenon is not present. We present an experimental activity that can be conducted in High School, in order to detect the whistler and analyze it with a sound editing program.  The graphical analysis allowed us to approximately determine that the frequency of propagating sound and its time detection are inversely related.

Author Biography

Jair Lúcio Prados Ribeiro, Colégio Marista de Brasília

Mestre em Ensino de Ciências, UnB, 2010.

Engenheiro de Infraestrutura Aeronáutica, ITA, 1996.

Published

2014-03-14

How to Cite

Ribeiro, J. L. P. (2014). Why the percussion of a spring produces the same sound of “blaster pistols” in the movie Star Wars?. Caderno Brasileiro De Ensino De Física, 31(2), 385–399. https://doi.org/10.5007/2175-7941.2014v31n2p385

Issue

Section

Atividades experimentais no ensino de Física