Materials List: Sound from Left or Right?

Photo shows a device made from the two metal ear pieces of a stethoscope each attached to clear plastic tubing that runs through metal eyelet screws attached to a piece of wood.
Figure 1. The activity set-up.
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Copyright © GK-12 Program, Computational Neurobiology Center, College of Engineering, University of Missouri

Each group needs:

  • stethoscope, the metal headset portion only (the ear tips and ear tubes, without the flexible tubing; see Figure 1 or slide 15)
  • wooden block (12 x ¼ x ¼ inch; 30 cm x 6mm x 6 mm)
  • hard (non-flexible) plastic tube, with ¼-inch inner diameter (ID), 40 cm long
  • 3 eyelet circle screws, with ¼-inch ID, so that the hard plastic tube goes through them
  • clear flexible plastic tube with a ¼-inch outer diameter (OD) and 0.176-inch ID, 1 meter long
  • hot glue, to secure the tube to the wooden block
  • 1-foot ruler, plastic or wooden
  • tape, to secure the ruler
  • pen or pencil, to tap the tube
  • Hearing Pre-Activity Quiz, one per student
  • Directional Hearing Worksheet, one per student
  • Sounds Right Post-Activity Quiz, one per student

To share with the entire class:

https://www.teachengineering.org/activities/view/umo_ourbodies_lesson02_activity4