Details of our foam vs hemp felt tests.

OPEN CELL FOAM, found here

VS

"Dope Felt", made with 100% Hemp fiber

1 Layer results-

2 Layer Test-

3&4 Layer Tests-

 Testing Equipment

This is the monitor I used

JBL LSR 308

This is the mic I used;

UMIK omni USB microphone

The software used for all tests and graphs

Room EQ Wizard

https://www.roomeqwizard.com