Acoustic Panel, Packaging Type : customize

1.1 slotted wood acoustic board is a kind of slit resonance absorption material which is
made from high density panel with grooves on the surface and perforated holes at the
back side.
1.2 it has strong selection on the sound spectrum and particular great performance on the
middle and low frequency.
1.3 it has better sound absorption effect on medium and high frequency if there is sound
absorption cotton filled at the back side cavity.
1.4 the design can be custom made
1.5 how to calculate the perforated rate:
1) when the hole line up in square
p=0.785*(db)m2
2) when the hole line up in equilateral triangle
p=0.907*(db)m2
p ----- perforated rate(%)
d ----- diameter of the hole
b ----- distance between two center of the holes