Doppler Effect Demonstration Apparatus, 92dB buzzer, 0.8m tether

• The buzzer is 92 dB while standing still, when spun a student can easily hear the shift in frequency
• Buzzer housing has a simple on/off switch and is constructed of rugged ABS plastic
• Nylon cord is 2'8" attached to a rugged ABS handle 8.5in long, 1in diameter)
• Battery not included

The perfect demonstration of the Doppler effect in a classroom (with caution of course). Swing the Doppler effect apparatus and students will be able to hear the change in frequency. Battery not included.