DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
3B40.00 | Doppler Effect | | |
3B40.10 | doppler buzzer | PIRA 200 | Swing a battery powered buzzer on a string around in a horizontal circle. |
3B40.10 | doppler buzzer | BC40.10 | A battery powered buzzer on a string is swung around in a horizontal circle. |
3B40.10 | doppler buzzer | AJP 29(10),713 | Mount a buzzer and a battery on opposite ends of a meter stick and rotate about the center of mass. |
3B40.10 | doppler buzzer | AJP 41(5),727 | Attach a Sonalert to a 2 m string and the shift is almost a minor third. MORE: interference and radiation resistance. |
3B40.10 | doppler speaker on turntable | Si-3 | A battery operated oscillator drives a speaker mounted on a 3' turntable. |
3B40.10 | doppler effect | Disc 10-21 | Mount two speakers on a rotating frame and attach to an audio oscillator through slip rings. |
3B40.13 | intermittent doppler speaker | 19-6.6 | A 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. |
3B40.15 | Doppler whistle | PIRA 1000 | |
3B40.15 | doppler whistle | 3B40.15 | A whistle on the end of a tube is blown while swung around in a horizontal circle. |
3B40.15 | doppler whistle | Si-1 | A small whistle at the end of a rubber tube is twirled around the head while being blown. |
3B40.15 | doppler whistle | 19-6.2 | A compressed air whistle on the end of a rubber tube is twirled around the head. |
3B40.16 | doppler rocket | 19-6.1 | A whistling rocket mounted on a rod is rotated in a three foot radius circle. |
3B40.18 | doppler effect | S-150 | A moving tuning fork, rotating reed, rotating whistle, and rotating speaker all show the Doppler effect. |
3B40.20 | Doppler spear | PIRA 500 | |
3B40.20 | doppler spear | 3B40.20 | Stroke a twelve foot aluminum rod until it sings, then hold it at the midpoint and thrust it toward the class. |
3B40.25 | Doppler reed | PIRA 1000 | |
3B40.25 | doppler reed | 3B40.25 | A reed is turned at the end of a motorized shaft. |
3B40.25 | doppler speaker pendulum | AJP 30(4),307 | Swing an earphone driven by an audio oscillator suspended as a pendulum. |
3B40.25 | doppler reed | Si-2 | A reed on an arm is rotated by a motor. |
3B40.25 | doppler reed | S-6b | An adjustable speed motor rotates an arm with a reed at the end. |
3B40.30 | Doppler beats | PIRA 1000 | |
3B40.30 | doppler beats | 19-6.3 | A 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. |
3B40.30 | doppler beats | 19-6.5 | The complete discussion of Doppler beats: swinging tuning forks and speakers of equal or unequal frequencies, moving reflector. Diagrams. |
3B40.32 | doppler radio on air track | AJP 39(2),229 | Modulate 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. |
3B40.33 | moving detector doppler | AJP 35(6),530 | A moving microphone detector is tuned to the Doppler shifted frequency of a loudspeaker. |
3B40.35 | doppler speakers | 19-6.4 | The difference tone between a stationary speaker and a pendulum speaker is amplified through a third speaker. Diagrams. Reference: AJP 12(1),23. |
3B40.50 | doppler effect analog | S-151 | A student drops paper riders on an endless string over two pulleys and the instructor picks them up while walking toward the student. |