Rumbling
Resonance!
You'll be amazed at the depth of sound that comes from our Big Thunder Drum.
Just shake it, and the vibrations in the spring are transmitted through the
angled drumhead to produce a thundering rumble that will shake your students
in their seats! The thunder resonates long after you stop shaking the drum.
The basic drum makes a similar, but much less thunderous sound.
Thunder drums "thunder" when vibrations in a
spring are transmitted through a drumhead and amplified in an open tube. The
vibrating spring causes the drumhead to vibrate, which in turn causes the
air inside the drum to vibrate. The air in the drum begins to resonate, and
the volume of the sound increases.
Even a small vibration in the spring can grow
into a large thundering sound. The Big Thunder Drum has an angled head to
increase the drumhead area. The larger drumhead creates a louder sound in
the drum. Your students will watch open-mouthed as "thunder" rolls
through your classroom.
To hear the sound of the thunder drums, click
here.
Activities and Uses
Show how the vibration in the spring becomes a
large sound. Make different sounds by making the spring vibrate
differently. Demonstrate how the eardrum works by speaking into the
end of the drum and feeling the vibration that travels down the spring.
Science Standards
In using this product,
national and states’ science education standards are covered. Some examples
are provided here. These are representative, however. Check with your state
to find the exact standards.
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Waves, including sound
and seismic waves, waves on water, and light waves, have energy and can
transfer energy when they interact with matter.
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Explain how sound
travels through different media.
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Relate characteristics
of sounds that we hear to properties of sound waves.
-
Demonstrate the
application of acoustic principles such as in echolocation, musical
instruments, noise pollution, and sonograms.
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