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Sound changes pitch relative to how you or the source of the sound is moving. Use this simple activity developed by the Exploratorium to experience the Doppler Effect yourself!
- 5 to 10 minutes
- Under 5 minutes
- 1 cent - $1 per student
- Ages 6 - 14
- Activity
- English
Quick Guide
Materials List (per student)
- Tennis ball or wiffle ball (something you can cut open)
- Knife
- A 9-volt battery and connector
- A 9-volt buzzer (a high-pitched one works best)
- Scrap paper to pack inside the ball
- Heavy rubber bands or tape
- Strong string
- Optional: On/off switch (available at hardware stores)
Subjects
-
Life Sciences
-
Human Body
- The Brain and Nervous System
-
Human Senses and Perception
- Hearing
- Perception
-
Human Body
-
Mathematics
- Measurement
-
Physical Sciences
-
Vibration and Waves
- Wave Properties
- Sound
- The Doppler Effect
-
Vibration and Waves
Other
This resource is part of:
Access Rights:
- Free access
By:
Rights:
- Creative Commons: Non-commercial Share Alike (by-nc-sa), Exploratorium Teacher Institute,