Uploaded September 2012 | Updated September 2026, 3 weeks ago

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More neat stuff with my piezoelectric crystal speaker using my homemade Rochelle salt crystals. These tests were prompted from comments on my How to Make a Piezoelectric Crystal Speaker video (see link below.) One was to test a smaller crystal since that's what most people who make their own have, and the other was that these work great when pressed against a window.

For the How to Make a Piezoelectric Crystal Speaker video see:
youtu.be/R7zjfaPKMSE

For the How to Make a Rochelle Salt Piezoelectric Crystal video see:
youtu.be/E1Ct3VUWvhQ

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