That cheap foam on Amazon


Details of our foam vs hemp felt tests.

OPEN CELL FOAM, found here




"Dope Felt", made with 100% Hemp fiber


1 Layer results-


 Baseline Waterfall image


2 Layer Test-


Decible reduction points


3&4 Layer Tests-



 Testing Equipment

This is the monitor I used



This is the mic I used;

UMIK omni USB microphone


The software used for all tests and graphs

Room EQ Wizard

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