Millennium Plastic takes the spaced absorber
principle one step further. The
High Density Plastic Sheet
is micro cracked to create the ideal airflow resistance to optimally absorb
the sound impinging on it. The low frequency absorption can be enhanced by
increasing the air space behind it.
The low frequency absorption is further enhanced by adding thermal insulation
such as Melamine Foam into the air cavity which resists the coupled volume
resonances common in the low frequency region