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Sound Level Indicator 003
Here’s how to build a pretty neat looking sound meter, I just bought some ear projection that is rated for 30db, so this might be fun to test if they really work with a visual indicator… [via] – Link.

More:
MAKE electronics archives – Link.

Phillip Torrone

Editor at large – Make magazine. Creative director – Adafruit Industries, contributing editor – Popular Science. Previously: Founded – Hack-a-Day, how-to editor – Engadget, Director of product development – Fallon Worldwide, Technology Director – Braincraft.


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