Resonator Earplug

A resonator earplug contains Helmhotz resonator chambers within an earplug cavity to increase noise attenuation. 

Click on the images to see the title page of the patents. Click on the links below to download full patents.



Multiple resonator attenuation earplug

See description above.

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John Parkins,
Mar 7, 2014, 8:45 AM
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