Tie two pieces of yarn around the outer two corners of a wire
hanger. Hold your arms in front of you (not like in the
picture) and gently swing the hanger so that it knocks up against a
table. You will hear a small tingling sound - nothing very
exciting. Next wrap the ends of the yarn around your fingers
and then stick your fingers in your ears like pictured about.
While keeping your fingers in your ears, swing the hanger gently
again against a table and listen to the AMAZING sound!! It's
not the sound you expect. This is my favorite easy science
experiment.
We also did the old experiment of making two cups, two paperclips
and string into a phone.
We found these cool toothbrushes at
Wal-Mart. They are called
Tooth Tunes. When you press
against the brushes you can faintly hear music playing but when you
press them against your teeth you hear the music loud and clear.
The sound vibrations actually travel from the toothbrush through
your teeth and through the bones in your skull and then to your
inner ear. So you hear the music through your head inside of through
the air. Cool! When Beethoven became deaf, he continued
to play the piano by placing a wooden baton in his mouth and laying
it against the piano. The vibrations would travel from the
piano to the wooden piece and then through his head so that he could
actually hear the music! Wow!!! Whale also "hear" this
way. Vibrations travel through their jaw bone to their ears.
Way cool!!!!
You can read more about bone conduction
here
We saw
this project at the science fair and are going to try it soon.
We also want to try feeling sound waves
through a balloon.
More cool things dealing with sound:
Cool Sonic Boom Pics
Unconventional Way to Play Guitar
