Doppler Ball

Item #P7-7120

$17.95 Bundle Discount

Unit Price	$17.95
10+	$16.70

Hear pitch change due to motion and the Doppler effect

Turn a classic wave phenomenon into an unforgettable experience. Arbor Scientific’s Doppler Ball is an Arbor Scientific-exclusive demonstration that makes the Doppler effect audible and engaging. Inside the soft foam ball is a battery-powered buzzer—turn it on and play catch. Thrown fast enough, students clearly hear the pitch change as the ball moves toward and away from them. Swing it on a string to create a continuous, controlled example of frequency shift. Simple, safe, and memorable, it brings wave physics to life in seconds. (Two CR2032 batteries included; color may vary.)

Why Teachers Love the Doppler Ball

Instant “aha” moment: Students hear the frequency shift immediately—no graphs or screens required.
Versatile demonstrations: Use by throwing, catching, or swinging on a string for repeatable results.
Quick setup: Built-in buzzer and included batteries mean it’s ready right out of the box.
Arbor-exclusive design: Purpose-built for classrooms to demonstrate Doppler clearly and reliably.

Resources

Doppler Ball Instructional Guide

What You Can Teach with the Doppler Ball

Ideal for upper elementary through high school physics and physical science:

Doppler effect: Frequency change due to relative motion between source and observer.
Waves & sound: Connect pitch to frequency and motion.
Relative motion: Compare approaching vs. receding sources.
Real-world applications: Relate to sirens, radar, astronomy (redshift/blueshift), and medical imaging (ultrasound).
Scientific observation: Predict, observe, and explain audible changes using wave models.