PIRA 3B40.00 DOPPLER EFFECT

DCS #DEMONSTRATIONREFERENCEABSTRACT
3B40.00Doppler Effect
3B40.10doppler buzzerPIRA 200Swing a battery powered buzzer on a string around in a horizontal circle.
3B40.10doppler buzzerBC40.10A battery powered buzzer on a string is swung around in a horizontal circle.
3B40.10doppler buzzerAJP 29(10),713Mount a buzzer and a battery on opposite ends of a meter stick and rotate about the center of mass.
3B40.10doppler buzzerAJP 41(5),727Attach a Sonalert to a 2 m string and the shift is almost a minor third. MORE: interference and radiation resistance.
3B40.10doppler speaker on turntableSi-3A battery operated oscillator drives a speaker mounted on a 3' turntable.
3B40.10doppler effectDisc 10-21Mount two speakers on a rotating frame and attach to an audio oscillator through slip rings.
3B40.13intermittent doppler speaker19-6.6A rotating speaker is switched on and off so sound is emitted only when the speaker is moving towards or away from the observer and arranged so the cone of sound is directed at the observer only. Reference: AJP 21(5)407.
3B40.15Doppler whistlePIRA 1000
3B40.15doppler whistle3B40.15A whistle on the end of a tube is blown while swung around in a horizontal circle.
3B40.15doppler whistleSi-1A small whistle at the end of a rubber tube is twirled around the head while being blown.
3B40.15doppler whistle19-6.2A compressed air whistle on the end of a rubber tube is twirled around the head.
3B40.16doppler rocket19-6.1A whistling rocket mounted on a rod is rotated in a three foot radius circle.
3B40.18doppler effectS-150A moving tuning fork, rotating reed, rotating whistle, and rotating speaker all show the Doppler effect.
3B40.20Doppler spearPIRA 500
3B40.20doppler spear3B40.20Stroke a twelve foot aluminum rod until it sings, then hold it at the midpoint and thrust it toward the class.
3B40.25Doppler reedPIRA 1000
3B40.25doppler reed3B40.25A reed is turned at the end of a motorized shaft.
3B40.25doppler speaker pendulumAJP 30(4),307Swing an earphone driven by an audio oscillator suspended as a pendulum.
3B40.25doppler reedSi-2A reed on an arm is rotated by a motor.
3B40.25doppler reedS-6bAn adjustable speed motor rotates an arm with a reed at the end.
3B40.30Doppler beatsPIRA 1000
3B40.30doppler beats19-6.3A naked tuning fork is moved back and forth in front of a wall; a poster board is moved back and forth behind a fork. Reference: AJP 10(2),120.
3B40.30doppler beats19-6.5The complete discussion of Doppler beats: swinging tuning forks and speakers of equal or unequal frequencies, moving reflector. Diagrams.
3B40.32doppler radio on air trackAJP 39(2),229Modulate an rf generator and tune two transistor radios to the frequency. Mount one on an air track and listen to the beats with the stationary radio.
3B40.33moving detector dopplerAJP 35(6),530A moving microphone detector is tuned to the Doppler shifted frequency of a loudspeaker.
3B40.35doppler speakers19-6.4The difference tone between a stationary speaker and a pendulum speaker is amplified through a third speaker. Diagrams. Reference: AJP 12(1),23.
3B40.50doppler effect analogS-151A student drops paper riders on an endless string over two pulleys and the instructor picks them up while walking toward the student.

ReferenceDescription
M-1Sutton
Ma-1Freier & Anderson
M-1dHilton
8-2.8Meiners
1A12.01University of Minnesota Handbook
AJP 52(1),85American Journal of Physics
TPT 15(5),300The Physics Teacher
Disc 01-01The Video Encyclopedia of Physics Demonstrations

Return to:
[WAVES AND OSCILLATIONS][MAIN BIBLIOGRAPHY]