Noise gun designed to check the sensitivity of microphones.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...n_fullsize.jpg
Previously:
Water pressure microphone - photo
Enormous megaphone from silent film era - photo
Noise gun designed to check the sensitivity of microphones.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...n_fullsize.jpg
Previously:
Water pressure microphone - photo
Enormous megaphone from silent film era - photo
New plans added on 11/22: Click here for 2,593 plans for homemade tools.
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