PrivacyShield® Plenum Return Silencer Assembly

This video demonstrates how to assemble the PrivacyShield® Plenum Return Silencer to reduce the amount of sound that enters a plenum space to increase speech privacy.
For more information on this product, go to: acousticalsolutions.com/produ...

[@jonathanlee3581]

Looks like it can be done with foam boards for DIYers. $600 is simply too much.