Stereo Hangar 

Material:

1 meter of string

paper clips of various sizes

1 hangar for each participant

 

  

 

Future Quicktime Movie and photos of the demo to go here!

Procedure:

Special Directions:

Allow students to investigate the possibilities of listening to these objects before giving any specific directions. Encourage them to get ideas from each other. After a few minutes of exploration, review what they know and what they are trying as a class. This will help students "learn" to connect the string to their fingers and put their fingers in their ears.

 

Safety Concerns:

Fold hangar tip around (to remove sharp, pointed end).

Questions:

How can you listen to the hangar?

What does a hangar sound like?

How does a hangar make a sound?

 

Science Concept:

Sound is vibration. When these objects vibrate they produce sound. The human ear hears the sound differently when it travels through the air compared to when it travels the length of the string. The string seems to amplify the sound simply because the string is a more efficient vibration medium than air.

Biology Menu