Wednesday, 19 February 2014 14:13

## G2-07: PSYCHOACOUSTIC VIBRATION TRANSDUCER

• ID Code: G2-07
• Purpose: Challenge your students to recognize pseudoscience while illustrating resonance
• Description: A traditional explanation: "When a group of people concentrate on one of the pendula, held as shown by the instructor, their psychoacoustic brain waves rapidly become in phase, producing enough mechanical energy to make only that pendulum oscillate."

Of course, this is actually a demonstration of driven resonance - with a bit of practice, via small movements of your hands you can drive any one of the pendula you choose. Encourage your students to analyze pseudoscientific explanations for real phenomena.

• Availability: Available
• Loc codes: G2
• #### G2-01 MASS ON SPRING - HAND HELD

Demonstrates resonance and phase shift at resonance Read More
• #### G2-02: FORCED HARMONIC MOTION WITH DAMPING - LARGE

Demonstrate and graph driven and damped harmonic motion. Read More
• #### G2-03: RESONANCE IN TORSIONAL PENDULUM - PROJECTION

Demonstrate quantitatively all aspects of the driven and damped oscillator. Read More
• #### G2-04: DAMPED OSCILLATIONS

Demonstrate damped harmonic oscillations. Read More
• #### G2-05: AIR TRACK - DRIVEN AND DAMPED OSCILLATIONS

Illustrate the behavior of a driven and damped oscillator. Read More
• #### G2-06: FRAHM'S FREQUENCY METER

Check the 60 Hz line voltage frequency. Read More

• #### G2-08: DRIVEN NONLINEAR OSCILLATOR

Demonstrate amplitude "jumps" and resonance hysteresis in Duffing's equation. Read More
• #### G2-09: FORCED HARMONIC MOTION WITH SONAR

Plot a graph of forced damped harmonic motion near the resonant frequency. Read More
• #### G2-11: RESONANT SAW BLADES - HAND DRIVEN

Show that a mechanical oscillator responds with a maximum amplitude to its own resonant frequency. Read More

• #### G2-21 COUPLED PENDULA

Demonstrates coupling of motion between two pendula of the same length Read More
• #### G2-22: BAR-COUPLED PENDULA

Demonstrate a coupling resonance and to show normal modes. Read More
• #### G2-23: SPRING-COUPLED PHYSICAL PENDULA

Demonstrate resonance and normal modes. Read More

• #### G2-25: COUPLED PENDULA - 1000:100:10:1 MASS RATIO.

Illustrate a complex resonance system. Read More
• #### G2-26: COUPLED AIR TRACK GLIDERS

Demonstrate coupled oscillations and normal modes in a system of two identical coupled air track gliders. Read More
• #### G2-27: COUPLED SERIES MASSES HANGING ON SPRINGS

Illustrate coupled oscillations and normal modes. Read More
• #### G2-28: COUPLED PENDULA WITH VARIABLE DRIVER

Show that the maximum coupling occurs between pendula of the same length. Read More
• #### G2-41: WILBERFORCE PENDULUM

Demonstrate a linear coupling resonance and normal modes. Read More
• #### G2-42: ELASTIC PENDULUM

Demonstrate a non-linear coupling resonance and stable fixed points. Read More
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