Outreach Demonstration Guide: Chladni Plates - Speaker
JUL 23, 2018
Build a simple Chladni plate using a 6" x 6" metal sheet, a 2 watt speaker, powered with a 20 gain amplifier and phone. Sprinkle sand on the sheet, and play various sound frequencies to reveal the sheet’s assortment of resonant vibrational modes. Along with the plate demo itself, an amplifier can be made fairly easily with an LM386 op amp. Download instructions for making the amplifier under associated files or can be found here.
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Looking for a new demonstration for an outreach event? Or want to jump start your chapter on outreach? These demonstrations have been developed by SPS to help you make a difference in your local communities. Each demonstration includes parts lists, instructions, key physical concepts to explain, and demonstration videos, where appropriate.
Audience:
High School (ages 14+)
Middle School (ages 11-13) & General Public
Elementary (ages 5-10)
Time:
10 - 20 min
Level of Difficulty:
Level 3